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climate
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  气候
    A Study on Response of Dominant Plants to Global Climate Change in Maowusu Sandland
    毛乌素沙地优势植物对全球气候变化的响应研究
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    Responses and Adaptations of Typical Plants to Climate Change and CO_2 Concentration Enrichment in Semi-arid Region
    半干旱区典型植物对气候变化与CO_2浓度升高的响应与适应
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    Study of the Response of Main Woody Plant Phenology to Climate Change in China
    中国木本植物物候对气候变化的响应研究
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    A Review of A.N. Strahler's "World Climate Classification" (Revised in 1978)
    斯查拉勒氏1978年修正世界气候分类的评介
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    RESPONSE OF WINTER WHEAT TO THE CLIMATE AT DIFFERENT ALTITUDES Ⅲ. SOME PHOTOSYNTHETIC CHARACTERISTICS OF THE PLANT
    冬小麦对不同海拔气候条件的反应 Ⅲ.植株光合作用特征
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  气候条件
    RESPONSE OF WINTER WHEAT TO THE CLIMATE AT DIFFERENT ALTITUDES Ⅲ. SOME PHOTOSYNTHETIC CHARACTERISTICS OF THE PLANT
    冬小麦对不同海拔气候条件的反应 Ⅲ.植株光合作用特征
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    Adaptation to Desert Environment of Macrofungi and Relativity with Climate Conditions in Daqinggou Natural Reserve
    大青沟自然保护区大型真菌对沙地环境的适应与气候条件的相关性
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    leptophylla grew in humid climate.
    leptophylla生长在湿润气候条件下。
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    2.The climate classification we seek must be useful in guiding land- use planning and increasing production.
    (二)生产实践观点:气候分类应充分揭示与人类生活和生产实践密切有关的气候特征,便于制定土地利用规划和国民经济增产计划,充分利用气候资源,改造不利气候条件
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    that theadequaCy climate value scope for introducing the Ginseng in the Province is aridgradient< 1; annual Precipitation>460mm; warm index>58℃ or 2300℃accumulation temperature < 10℃.
    黑龙江省引种栽培西洋参适宜气候条件是干燥度1,年降雨量>460mm、温暖指数>58℃或≥10℃积温>2300℃。
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  “climate”译为未确定词的双语例句
    NONLINEAR RESPONSE FUNCTION OF GROWTH OF PINUS MASSONIANA TO CLIMATE
    马尾松直径生长与气侯的非线性响应函数
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    Studies on the Relationship Between the Egg Laying and Climate of chinese Alligator Climate
    扬子鳄产蛋与天气关系的研究
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    PALIBINIA FROM THE EOCENE OF JIANGXI, CHINA——WITH REMARKS ON THE DRY CLIMATE MECHANISM OF NORTHERN HEMISPHERE IN PALEOGENE
    中国江西始新统的Palibinia——兼论北半球古近纪干旱气候形成机制
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    Dynamic phenological models and their application in climate change research
    动态物候模型发展及其在全球变化研究中的应用
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    Correlation analysis of regional vegetation seasonal fluctuation and climate factors based on MODIS-EVI.
    基于MODIS-EVI区域植被季节变化与气象因子的关系
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  climate
Our study indicates that the model can be applied to study the interaction between land surface processes and atmospheric boundary layers over various underlying surfaces and their regional climate effects.
      
This paper will establish a solid foundation to investigations on the coupling of climate models and the biosphere.
      
This area has a harsh climate due to low temperatures and low air pressure at high elevations.
      
With a temperate continental monsoon climate, the mountain area belongs to the warm temperate deciduous broad-leaved forest region.
      
It is important to be able to monitor and estimate forest biomass and production, regional carbon storage, and global climate change impacts on these important vegetation types.
      
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Ⅰ. A brief mosquito survey was carried out in Changsha, Hunan Province from March to October, 1954. Adult pupae as well as larvae were collected from various habitats. As a result, twenty-six species of nine genera were discovered. They are 1. Anopheles hyrcanus var. sinensis, 2. Tripteroides aranoides, 3. Uranotaenia macfarlanei. 4. U. bimaculata, 5. Orthopodomyia anopheloides, 6. Ficalbia luzonensis, 7. Mansonia uniformis, 8. Armigeres obturbans, 9. Aedes vexans, 10. Ae. niveus, 11. Ae. albopictus, 12. Culex...

Ⅰ. A brief mosquito survey was carried out in Changsha, Hunan Province from March to October, 1954. Adult pupae as well as larvae were collected from various habitats. As a result, twenty-six species of nine genera were discovered. They are 1. Anopheles hyrcanus var. sinensis, 2. Tripteroides aranoides, 3. Uranotaenia macfarlanei. 4. U. bimaculata, 5. Orthopodomyia anopheloides, 6. Ficalbia luzonensis, 7. Mansonia uniformis, 8. Armigeres obturbans, 9. Aedes vexans, 10. Ae. niveus, 11. Ae. albopictus, 12. Culex fuscanus, 13. C. vorax, 14. C. hayashii, 15. C. (Neoculex) sp. 16. C. malayi, 17. C. (Lophoceratomyia) sp. 18. C. pallidothorax, 19. C. bitaeniorhynchus, 20. C. sinensis, 21. C. whitmorei, 22. C. tritaeniorhynchus, 23. C. mimeticus. 24. C. mimutus, 25. C. vagans and 26. C. fatigans. Among these species Tripteroides aranoides, Uranotaenia bimaculata, Orthopodomyia anopheloides and Ficalbia luzonensis were recorded for the first time in the province.Ⅱ. As regards the distribution of these twenty-six species in Changsha, twelve of them were found in Tung Ch'u (or East District) and Pei Ch'u (or North District), ten in Nan Ch'u (or South District), and Si Ch'u (or West District), sixteen in Chin Pan Ch'u, thirteen in Wen I Ch'u, twenty-one in Hui Chuan Ch'u and Yue Lo Ch'u. In the city thirteen species were found and in suburb, twenty-five species.Ⅲ. The daytime resting places of mosquitoes have been classified as household, pigsties, cowstable, villages and hills. Different species of mosquitoes prefer different quarters as their daytime resting places.Ⅳ. Larvae of seventeen out of twenty-six species of mosquitoes have been found Their breeding places and their association with other species are discussed.Ⅴ. On the basis of larval collection six species are considered as important and common in Changsha, namely Culex fatigans, C. tritaeniorhynehus, C. vorax, Anopheles hyrcanus var. sinensis Aedes albopictus and Armigeres obturbans. The correlation between climate and ecology of these six species is also touched on.Ⅵ. A key to the identification of all known species of mosquitoes of Hunan is given.

一.1954年3—10月,在长沙市初步调查蚊虫,共採得蚊种9属26种。其中有按蚊属1种、拟三翅蚊属1种、Uraunotaenia属2种、Orthopodomyia属1种、番蚊属1-种、曼蚊属1种、阿蚊属土种、蚊属3种及库蚊属15种(其中2种未定名)。所採得的9属26种蚊虫中,有树竹拟三翅蚊、Uranotaenia bimaculata、Orthopodo-myia anopheloides及罗宗番蚊4种,在湖南尚系首次报告。 二.长沙市蚊种的分佈,郊區有25种、中心區有13种。较为常见者有致乏库蚊、三 带喙库蚊、中华按蚊、白纹伊蚊貪食库蚊及骚扰阿蚊六种。 三.”长沙市各种成蚊的停歇处,主要是山陵、住宅、郊野及猪、牛栏。 四.在长沙市所发现的蚊虫中,只发现17种幼虫。各蚊种幼虫孳生地的范围是有差别的。致乏库蚊及贫食库蚊范围最广;Uranotaenia bimaculata、othopodomyiaanopheloides、黑足伊蚊的幼虫,只在树洞渍水中发现。 五.各蚊种幼虫间共生情况,已在文中讨论。 六.在调查的过程中,发现黑足伊蚊在傍晚时吸吮人血。 七.将湖南省已肢知蚊虫编为俭索表,以便有关工作人员之参考。

The city of Lanehow lies in the central part of China in latitude approximate 36°03′north, longitude 103°57'east, at elevation 1,508.53 M. Kowlanshan, the area surveyed, being one of the many loess plateau hills surrounding Lanchow, situates on the southeastern suburb of the city. Physiographically, the area is a part of the dissected loess plateau with an altitude of 1,508-2100 M. Owing to the influences of the geographical condition and high elevation, the climate of this area is of continental climatic...

The city of Lanehow lies in the central part of China in latitude approximate 36°03′north, longitude 103°57'east, at elevation 1,508.53 M. Kowlanshan, the area surveyed, being one of the many loess plateau hills surrounding Lanchow, situates on the southeastern suburb of the city. Physiographically, the area is a part of the dissected loess plateau with an altitude of 1,508-2100 M. Owing to the influences of the geographical condition and high elevation, the climate of this area is of continental climatic type. The mean annual precipitation is 338.6mm. with 61.1% of it falling in June, July and August, annual mean temperature, 6.9℃., relative humidity, 58%, annual total evaporation, 3,571mm. and annual mean wind velocity 5.8m/sec. The upper portion of the hill is entirely covered with a thick layer of loess and underneath lies the red earth of the tertiary period. As a result of that, soils in the area surveyed, which has been developed from the loess, is high in calcium content. It belongs to the chestnut soil type with a PH value between 7.6 and 8.1. The vegetation of this area shows the following ecological characteristics: 1) The specific composition of the plant is rather scanty with about. 124 speeies belonging to 93 genera and 41 families; 2) The vegetation bears a simple physiognomy. No natural growth arbor been found in the whole area during the period of investigation, though a few species of cultivated trees are found and the vegetation is mainly composed of semi-frutexes and herbages; 3) Most of the essential species distributing here express distinct xeromorphic structures and many of them are typical components of the vegetation of the steppe and semi-dessect, such as Caragana spp., Hololachne soongarica Ehrenb., Artemisia spp., Chrysanthemum neofruticulosum Ledeb., Stipa spp. Achnatherum splendens Ohwi. and so on. Four plant associations are found in this area. Three of them distribute on the Dorthern slope and one on the southern slope of the hill. They are described as follow: Ⅰ. Chenupodium album+Artemisia annua+Elymus dasystachys Association. The distribution of this association is limited to the erosion valleys situating on the piedmont belt of the northern slope at an elevation between 1, 510 and 1, 560 M., where the edaphic condition is marked by high soil moisture content. The climatic features are of low light intencity with short duration of daily sunshine, high relative humidity and low wind velocity. Three hygrophilous and shade-loving species are the main constituents of this association. They are chenopodium album L., Artemisia annua L., and Elymus dasystachys Trin. Other herbaceous plants are Chenopodium glaucum L.. Sonchus aler- aceus L., Xanthium strumarium L., Polygonum amphibium L., P. aviculare L. etc. A few shrubs are present in the association. They are Lycium chinensis Mill., Lonicera heteroloba Batal. and Lonicera ferdinandi Fr. Ⅱ. Artemisia pectinata Association. The Artemisia pectinata Association occurs on the piedmont belt of the northern slope at an elevation varying from 1510 to 1580 M. It occupies the open slope with gradients under 15°. The climatic conditions, in speaking of the northern slope, are rather high in temperature, strong light intencity, low relative humidity and low wind velocity. The projective total cover-degree is about 50% and Artemisia pectinata Pall. appears to be the dominant species in the association. Besides, there are species of thermophilous and heliophilous plants such as Salsola kali L., S. arachnoides‘Moq’. Kung, Cymbaria mongolica Maxim., Artemisia capillaris Thumb., Aster altaicus willd., chrysanthemum neofruticulosum Ledeb., which are frequently scattered among the dominant plants. Plants growing in this association, are all below 10 cm. in height. They give an appearence of open association. Ⅲ. Chrysanthemum neofruticulosum+Artemisia sacrorum var. latiloba—Polytrichum sp. Association. This association, being the largest one in the surveyed area, appears on the northern slope, where it occupies the space ranging from altitude 1,580M. to the top of the hill,2,100M, above the sea level. Soil is of chestnut soil type with a PH value of 8. 0—8. 1.The soil moisture content varies between 6.0 and 7.4%(layer above 60 cm.). In vertical structure, the association consists of two strata. They are described below: Stratum Ⅰ: This stratum includes all shrubs, semi-frutexes and herbages which are taller than 10 cm. in height. Among the plants found in this stratum, chrysanthemum neofruticulosum Ledeb. and Artemisia sacrorum var. latiloba Ledeb. are dominant species and Stipa Bungeana Trin. is the subdominant one. Other species one may frequently meet with are Allium subangulatum Rag., Saussurea nigrescens Maxim., Peganumharmala L., Astragalus dahuricus Dc., Potentilla multifida L., Linum perenne L., Car-agana frutex K. Koch. etc. They spread widely in almost all over the association. Stratum Ⅱ: This stratum is composed of those species less than 10 cm. in height, forming the ground flora of the association. Polytrichum sp. and Lichens are the essential plants in the stratum. One may occasionlly find species of Plantago Lessingii and Gentiana squarrosa Ledeb. growing among those main constituents. The underground stratification of the association has also been studied during the time of surveying. IV. Stipa Bungeana+Aster altaicus+Chrysanthemum neofruticulosum Association. This association distributes on the entire southern slope except the portions tilled for agriculture purposes. The striking local ecological conditions of this association are strong light intensity with long duration of daily sunshine, high temperature, low relative humidity and extremely low in soil moisture content which ranges between 2. 7 and 4. 0% (the layer above 60cm.). On account of the severe destruction of natural vegetation by man and cattle in the past years, the degree of soil erosion is serious throughout the slope where the association locates. The PH value of the soils is 7.4-76. The polydominant plants in this association are Stipa Bungeana Trin., Aster altaicus Willd. and Chrysanthemum neofruticulosum Ledeb. They are quite adaptable to the drought condition of the environment and distribute widely in the association. Besides, other xerophilous or drought resistant plants are frequently met, such as Hololachne soongarica Ehrenb., Linum perenne L., Astranalus dahuricus Dc., Peganum harmala L., Artemisia sacrorum var. latiloba Ledeb., Artemisia capillaris Thumb., Incarvillea Iutea Bur.&Franch., Kochia scoparia Schred. etc. They dispersely grow in the association. In addition to the frequent species mentioned above, Salsola ruthenica Iljin. and S. arachnoides‘Moq’. Kung form seperately micro-associations lying scatterly on the slope. No ground flora stratum may be found and the association shows no above ground stratification. The projective total cover-degree of this association is only about 25-30%. Owing to the difference in the aspects of the northern and sourthern slopes, the climatic and edaphic conditions vary remarkable. Therefore, the vegetation of the surveyed area shows distinctions in distribution, floristic composition, physiognomy, structure, condition in growth and development of plants in the association of different slopes. Taking the floristic composition for example, the following species are entirely absent in the association of the northern slope, yet they are main components on the southern one: Pappophorum brachystachyum Taub. et Spach, Thermopsis lanceolata R. Br., Caragana spinosa Dc., Stellera chamaejasme L., Hololachne soongarica Ehrenb., Nitraria schoberi L., Pennisetum flaccidum Griseb. Differences in elevation also induce striking changes in climatic and edaphic con-ditions especially in aspects of air temperature, relative humidity and soil moisture content. All these gives great influence to the alterations either in quantity or in quality of each species distributing along the northern slope of the area. Following the seasonal change, the physiognomy of the associations expresses sucession of seasonal aspect. Vernal, aestival and autumnal aspects have been observed and recorded.

兰州位于我国的中心,约占北纬36度03分,东经103度57分,拔海1508.53米。皋兰山是兰州四周环山中的最高峰,位居兰州市东南郊。在地形上,皋兰山属于分割黄土高原山岭的一部分,拔海高度约为2100米。由于地理位置及海拔的影响,兰州的气候属大陆性气候类型。年平均温度为6.9℃,年平均雨量为338.6毫米,而61.61%集中在6、7、8、三个月,全年各月平均相对湿度为58%,年蒸发量则达3,571毫米,风力为5.8米/秒。皋兰山山岭的顶部均为厚层的黄土所掩盖,其下则为第三纪红土层。因此,调查区的土壤,全由黄土母质发育而来,含多量钙质,属栗钙土类,PH值为7.6—8.1。调查区的植被,有如下的生志特点:(1)植物种属比较贫乏:全区植物只有41科,93属,124种;(2)群落外貌单纯:调查区内缺乏自然生长的乔木,植被主要由半灌木与草本植物所构成,属干燥草原区的灌木草本群落型;(3)植物具明显旱生形态:群落主要成分,很多是干燥草原区的代表种属,如锦鸡儿属、蒿属、菊属的小黄菊(Chrysanthemum neofruticulosum Ledeb.)、羽茅属、芨芨草等。它们都具有各种适应干旱环境的形态特征。调查区植物...

兰州位于我国的中心,约占北纬36度03分,东经103度57分,拔海1508.53米。皋兰山是兰州四周环山中的最高峰,位居兰州市东南郊。在地形上,皋兰山属于分割黄土高原山岭的一部分,拔海高度约为2100米。由于地理位置及海拔的影响,兰州的气候属大陆性气候类型。年平均温度为6.9℃,年平均雨量为338.6毫米,而61.61%集中在6、7、8、三个月,全年各月平均相对湿度为58%,年蒸发量则达3,571毫米,风力为5.8米/秒。皋兰山山岭的顶部均为厚层的黄土所掩盖,其下则为第三纪红土层。因此,调查区的土壤,全由黄土母质发育而来,含多量钙质,属栗钙土类,PH值为7.6—8.1。调查区的植被,有如下的生志特点:(1)植物种属比较贫乏:全区植物只有41科,93属,124种;(2)群落外貌单纯:调查区内缺乏自然生长的乔木,植被主要由半灌木与草本植物所构成,属干燥草原区的灌木草本群落型;(3)植物具明显旱生形态:群落主要成分,很多是干燥草原区的代表种属,如锦鸡儿属、蒿属、菊属的小黄菊(Chrysanthemum neofruticulosum Ledeb.)、羽茅属、芨芨草等。它们都具有各种适应干旱环境的形态特征。调查区植物群落,可区分为下列的四个群丛: 1.白药+黄花蒿+厚穗滨草群丛(Chenopodium album+Artemisia annus+Elymus dasystachys Association) 本群丛分布于皋兰山山麓的侵蚀沟谷内,约占海拔1510至1560米的地段。所在地气候与土壤特点是光线弱、日照时间短、风力小、大气相对湿度大与土壤潮湿。群丛优势种有白藜、黄花蒿和厚穂滨草三种喜湿耐阴植物。此外,伴生有灰绿藜、苦苣菜、苍耳、两栖蓼、扁蓄等草本植物。灌木则可见枸杞(Lycuim chinensis Mill)、紫金银花(Lonicera heteroloba Batal.)、裴氏金银花(L.ferdinandi.Fr.)三种。 2.篦叶蒿群丛(Artemisia pectinata Association) 这一群丛占据皋兰山北坡山麓海拔1510—1580米,坡度在15°以下的开旷地段。其环境条件,在北坡来说,主要表现于阳光充沛,温度高,大气相对湿度低与土壤干燥。群丛总夏盖度约为50%,而以篦叶蒿最占优势。常见植物有钾猪毛菜、灰蓬(Salsola arachnoides‘moq’Kung)、蒙古芯芭(Cymbaria mongolica Maxim.)、茵陈蒿、阿尔泰紫菀、小黄菊等喜光喜温种类。 3.小黄菊+供蒿-藓群丛(Chrysanthemum neofruticulosum+Artemisia sacrorum var latiloba-Polytrichum sp. Association) 本群丛包括皋兰山北坡自海拔1580米以上一直至山顶(海拔2100米)的全部地段,为调查区内分布面积最广的群丛。其生态环境是阳光弱、日照时间短、蒸发量小、气温低;土镶为栗钙土,PH值在8.0—8.1左右,土壤风干含水量为5.2—5.6%。群丛在垂直结构上,可分为两层:第一层包括高度在10厘米以上的灌木、半灌木与草本植物,而以小黄菊和供蒿最占优势。本氏羽茅则为本属中的亚优势种。常见植物尚有野葱、青木香(Saussurea nigrescens Maxim.)、骆驼蓬、达乌里紫云英,多裂委陵菜、宿根亚麻、木锦鸡儿(Caragana frutex K. Koch.)等。第二层为地被层,主要由藓类和地衣所组成。此外,偶尔出现细叶车前(Plantago Lessingii)与鳞叶龙胆(Gentiana squarrosa Ledeb.)铺地生长。群丛总复盖度约为67%。 4.本氏羽茅+阿尔泰紫菀+小黄菊群丛(Stipa Bungeana+Aster altaicus+Chrysanthemum neofruticulosum Association) 这一群丛占皋兰山南坡除农田以外的全部地区。其气候与土壤条件,可归纳为下:日晒强烈、日照时间长、气温高;人为对自然植被破坏强烈,表土冲刷现象异常严重。土壤水分含量甚低,仅占风干重的1.88—3.41%,pH值为7.4—7.6。本氏羽茅、阿尔泰紫菀与小黄菊为群丛中的主要种类。它们对于干旱的环境均具有强大的适应力。其他常见植物有红砂、宿根亚麻、达乌里紫云英、骆驼蓬、供蒿、茵陈蒿、黄角蒿(Incarvillea lutea Bur.&Franch.)地肤等抗旱或耐旱种类。苏联猪毛菜(Salsola rutheniea Iljin)和灰蓬,常各成单纯小群丛,出现于山坡间。本群丛中缺地被层,无地上成层现象。群丛总复盖度仅为25—30%。由于南北坡取向不同所引起气候与土壤因子的变化,调查区植物群落,在分布、结构、外貌、种类成分及生长发育状况上,也随着发生很大的差异。海拔高度的改变,对气温、相对湿度,土温及土壤水分状况的影晌,也明显地反映在群落中各个种间的数量比例关系上。随着季节的更换,群落中的种类成分,表现出比较显著的季相演替关系。作者等曾作北坡群丛春、夏和秋三季季相的观察与纪录。

This paper discusses four problems about the life history and habitations of the pine-cater-pillar Dendrolimus punctatus Wk. 1. The life history as relations to the climate factor: The caterpillar occures 2--3 genera-tions per year, it means that one part overwintering with second and the others with third ofthe unmatured larvae. The break of each generation nearly coincides to each other in every year,but if the weather is faul in March and April, and the monthly rainfall is higher, the date ofcocoon-spinning...

This paper discusses four problems about the life history and habitations of the pine-cater-pillar Dendrolimus punctatus Wk. 1. The life history as relations to the climate factor: The caterpillar occures 2--3 genera-tions per year, it means that one part overwintering with second and the others with third ofthe unmatured larvae. The break of each generation nearly coincides to each other in every year,but if the weather is faul in March and April, and the monthly rainfall is higher, the date ofcocoon-spinning of the overwintered larvae will be delayed, thus the following generation willalso be delayed. Otherwise, if the weather is fine in March and April, the date of cocoon-spinning will take place quicker awhile. 2. The duration of starvation of the nearly matured larvae as relations to the percentageof emergence, egg-contains in female and to the sexual ratio: The experiment indicates, thatgiving the larvae nearly matured in starvation condition, most of them can oblige to cocoon-spinning. The percentage of the date of emergence of these cocoon is nearly inversely propo-tional with the date of enduring hunger, and the femal individuals will a little increase ascompared with in normal condition, but the egg-contains are decreased regularly as to the dateof enduring in starvation. This experiment indicates, that the nearly matured larvae when confront the lacking of foodplant will still enter to cocoon-spinning. They are also the source of the mass out-break, wemay continue to pay a great attention to them, control them in a proper time. 3. The percentage of emergence, sexual ratio as relations to the out-break of the pine-cater-pillar: According to our work, when the density of the pine-caterpillar increases, the percentageof emergence still contains in a rather larger degree (as in 70% or more), and the sexuel ratioapproaches to 1: 1, That the out-break of this caterpillar may be come sooner. This suppositionwill be confirmed by the further study, but it at least gives us an expectation to anticipate thedate of out-break in a rather simple way. 4. Migration and dispersion of the new-hatched larvae, the nearly matured larvae and thechanging of the larvae in a giving number in the pine tree: According to our observation thatthe method of dispersion of the new-hatched larvae is by the helpness of the wind, the directionof the dispersion is corresponding to the direction of wind, the dimension of the dispersionarea and the percentage of living individuals are relations to the velocity of wind and density oftrees. The migration of the nearly matured larvae is mainly by means of crawling. They havethe habitation of aphototropisism and negative geotropism. As to the changing of the larvae ina giving number in the pine tree. they are much concerned to the wind velocity in hatching,the egg deposition and the density of larvae in these trees.

这篇报告主要讨论了有关松毛虫发生规律的四个问题: 1.松毛虫年生活史和气候因子的关系:累积四年观察的资料,肯定了松毛虫在莲塘一年发生2—3代,即其一部分以第二代中小幼虫,一部分以第三代中小幼虫过冬,各代每个态别的盛发期,基本一致,但如3、4月间温度低,阴雨天长,降雨量多,则能延缓越冬代幼虫的结茧,这样,以后各代,也会顺次略为推延。3—4月温度高,结茧期也会相应略为提早。 越冬二、三代幼虫结茧的迟早问题,在这篇文章中,也讨论到了。由于第二代越冬幼虫在8月中下旬起,食量即大减少,停食期早,次春开始取食日期,又比较晚。第三代越冬幼虫没有这种现象。所以这二种世代在次春的结茧变蛾期,相差不大。在有些情况下,由于晚秋寒冷降临较迟,第三代越冬幼虫取食期延长,甚而还有可能比第二代提早几日结茧。 2.大幼虫耐饥与羽化率,含卵数和性比等的关系:这个项目,是因为看到松毛虫在大发生时,松针被完全吃光,有些幼虫,还能被迫结茧,为欲了解这些虫茧在今后的命运,试验共进行了二年,计二批,所得结果,证明大幼虫在接近结茧时耐饥,多数仍然能被迫结茧,这些虫茧的羽化率高低,与耐饥日期长短,大致上成反比,即结茧距耐饥日期短的,羽化率要高于日期长的。性...

这篇报告主要讨论了有关松毛虫发生规律的四个问题: 1.松毛虫年生活史和气候因子的关系:累积四年观察的资料,肯定了松毛虫在莲塘一年发生2—3代,即其一部分以第二代中小幼虫,一部分以第三代中小幼虫过冬,各代每个态别的盛发期,基本一致,但如3、4月间温度低,阴雨天长,降雨量多,则能延缓越冬代幼虫的结茧,这样,以后各代,也会顺次略为推延。3—4月温度高,结茧期也会相应略为提早。 越冬二、三代幼虫结茧的迟早问题,在这篇文章中,也讨论到了。由于第二代越冬幼虫在8月中下旬起,食量即大减少,停食期早,次春开始取食日期,又比较晚。第三代越冬幼虫没有这种现象。所以这二种世代在次春的结茧变蛾期,相差不大。在有些情况下,由于晚秋寒冷降临较迟,第三代越冬幼虫取食期延长,甚而还有可能比第二代提早几日结茧。 2.大幼虫耐饥与羽化率,含卵数和性比等的关系:这个项目,是因为看到松毛虫在大发生时,松针被完全吃光,有些幼虫,还能被迫结茧,为欲了解这些虫茧在今后的命运,试验共进行了二年,计二批,所得结果,证明大幼虫在接近结茧时耐饥,多数仍然能被迫结茧,这些虫茧的羽化率高低,与耐饥日期长短,大致上成反比,即结茧距耐饥日期短的,羽化率要高于日期长的。性比上,则经耐饥后结茧的,蛾数目似乎要比常态下结茧的多些。?

 
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