助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   air temperature 的翻译结果: 查询用时:0.013秒
图标索引 在分类学科中查询
所有学科
气象学
林业
海洋学
园艺
农作物
生物学
农业基础科学
地球物理学
环境科学与资源利用
更多类别查询

图标索引 历史查询
 

air temperature     
相关语句
  气温
     RELATIONSHIP BETWEEN THE KEY REGION SST OF THE TROPICAL EASTERN PACIFIC AND AIR TEMPERATURE OF NORTHEAST CHINA
     热带东太平洋关键区海温与中国东北地区气温的关系
短句来源
     THE INFLUENCE OF THE ENSO EVENTS ON THE AIR TEMPERATURE OF SOUTH CHINA IN WINTER AND SPRING
     ENSO事件对中国南方冬春季气温的影响
短句来源
     Abrupt variations of the total ozone in Beijing area and its relationship with upper air temperature
     北京地区臭氧总量的突变及其与高空气温的关系
短句来源
     Diagnosis of Crop Water Deficit by Canopy——Air Temperature Difference
     用冠层温度—气温差方法诊断作物缺水状况的研究
短句来源
     Change Trends of the Mean Annual Air Temperature in the Last Century in the South Shetland Island, Antarctica
     南极南设得兰群岛近百年年平均气温变化趋势
短句来源
更多       
  空气温度
     For a sand-planting workshop of 5m×3.5m×2.2m for making brown fused aluminum abrasive cloth,the optimal air temperature is 25℃±2℃,the relative humidity is 50%±5%,while the air velocity is 1.2 m/s for P100A, and 1.0 m/s for P180A.
     以5m*3.5m*2.2m植砂间生产棕刚玉砂布为例,最佳空气温度为25℃±2℃,相对湿度为50%±5%,空气流速1.2m/s~1.0m/s。
短句来源
     3. In mid-May, the air temperature of intra and outside network fit for the order is:130m×300m<260m×300m<300m×400m
     3.在5月中下旬,林网内外空气温度的大小顺序为130m×300m林网<260m×300m林网<300m×400m林网<对照。
短句来源
     surface soil temperature reduced by 3.86℃ and 5.42℃,soil temperature in the depth of 30 cm reduced by 1.01℃ and 1.44℃,air temperature reduced by 1.50℃ and 2.40℃ respectively;
     地表温度分别降低了3.86℃和5.42℃,30 cm处土壤温度降低了1.01℃和1.44℃,空气温度降低了1.5℃和2.4℃;
短句来源
     To maintain high leaf water use efficiency, optimal scope of stomatal conductance, photosynthesis available radiation, air temperature and soil moisture are 200~350 μmol·m -2 ·s -1 , 400~900 μmol·m -2 ·s -1 , 28~34℃ and 85%~90% of saturated soil moisture, respectively .
     有利于获得较高水分利用效率的气孔导度、光合有效辐射、空气温度和土壤水分范围分别是200~350μmol·m-2·s-1、400~900μmol·m-2·s-1、28~34℃和85%~90%的土壤饱和含水率。
短句来源
     The result shows that the catalyst is featured by high catalytic activity and advantage in economy when the best polymerization conditions with the reaction temperature at 170 ℃ , reaction pressure at 6.0 MPa , the volume velocity at 0. 5 h- 1 , the micro- wetness air temperature at 45 ℃ , the reaction temperature at 800 ℃ and 12% mass fraction of active composition.
     结果表明,采用温度为170℃,压力为6.0 MPa,体积空速为0.5 h-1的最佳聚合工艺条件,微湿空气温度为45℃,处理温度为800℃,活性组分的质量分数为12%时,催化剂具有较好的催化活性和优良的经济性。
短句来源
更多       
  温度
     Effect of Amibient Air Temperature on the Temperature Rise of Asynchronous Motor
     环境冷却介质(空气)温度对异步电动机温升的影响
短句来源
     Diagnosis of Crop Water Deficit by Canopy——Air Temperature Difference
     用冠层温度—气温差方法诊断作物缺水状况的研究
短句来源
     Research on Influence of Air Temperature,Current and Humidity on Skin Temperature
     气温、气流、气湿对皮肤温度影响的研究
短句来源
     Analysis of the Life and Loading Capacity of the Transformers Operating on High Air Temperature Conditions
     特殊温度条件下变压器寿命和负载能力分析
短句来源
     Gray prediction of air temperature of deep and hot mine pit in metal mine
     金属矿山深热矿井空气温度的灰色预测
短句来源
更多       
  大气温度
     ⑥regression equation of transpiration rate of Caragana korshinskiiin with air humidity, ground temperature of 0cm and 5cm, air temperature is:Tr = -4.809M + 29.302G_0 - 4.128G_5 - 44.1331+1095.743, R = 0.926. regression equation of transpiration rate of A.
     Tr=-4.809M+29.302G_0-4.128G_5-44.133T+1095.743,R=0.926; 赖草蒸腾速率与空气湿度、表层0cm地温、20cm地温和大气温度的回归方程为:
短句来源
     Among them, the amount of soil respiration has greater correlation with soil water content (0-20cm), soil temperature (5cm, 10cm, 15cm, 20cm), air temperature and air moisture, only soil surface (0cm) has a poor correlationship with soil respiration.
     土壤呼吸量与土壤湿度(0~20cm)、土壤温度(5cm、10cm、15cm、20cm)、大气温度、大气湿度的相关性较大,只有0cm土壤温度与土壤呼吸相关性较差。
短句来源
     (3) The Pn of the wild C. praecox reached as high as 23.6 μmol CO 2 m 2 s 1 when the photosynthetic active radiation (PAR) was 800~900 μmolm 2 s 1 , air temperature (Ta) 28 ℃, relative humidity (Rh) 75%.
     (3)在光合有效辐射 (PAR)为 80 0~ 90 0 μmol m-2 s-1、大气温度 (TA) 2 8℃左右、相对湿度 (RH)约75%的条件下 ,野生蜡梅的 Pn可高达 2 3.6 μmol CO2 m-2 s-1。
短句来源
     Using Non-Boussinesq POP model and the air temperature and wind stress fields at 1 000hPa from NCEP,the sea level and heat content of the Pacific Ocean from 1960 to 1999 were simulated.
     用Non-Boussinesq POP模式和1960—1999年NCEP的1 000hPa大气温度和风场资料,模拟了最近40a太平洋海面高度和热容量的变化,通过与实际观测结果比较,得出模拟结果可信的结论,并且得到了如下有意义的结果。
短句来源
     photosynthetic available radiation(PAR),intercellular CO2 concentration(Ci),air temperature(Ta),leaf temperature(Tl)had positively relationship with Pn in intercropping pattern. Ci,transpiration rate(Tr)had positively relationship with Pn in monoculture;
     栗茶间作模式下茶树净光合速率(Pn)与胞间CO2浓度(Ci)和光合有效辐射(PAR)和大气温度(Ta)和叶面温度(Tl)呈显著相关,单作模式下茶树净光合速率(Pn)与胞间CO2浓度(Ci)和蒸腾速率(Tr)呈显著相关;
短句来源
更多       

 

查询“air temperature”译词为其他词的双语例句

 

查询“air temperature”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  air temperature
Results indicated that photosynthetic available radiation, air temperature and relative humidity can affect xylem embolism by daily adjustment of stomatal conductance, transpiration rate and water relations of a tree.
      
The results showed that: 1) the wind velocity and sand transport rate in the plantation were less than those in dunes; 2) the air temperature in the plantation was lower than those in dunes.
      
The environmental factors, including relative humidity (RH), precipitation, vapor pressure deficit (VPD), photosynthetically active radiation (PAR), and air temperature (Ta) were recorded simultaneously.
      
Sap flow velocity had significant positive correlations with solar radiation, air temperature, vapor pressure deficit and wind speed and a negative correlation with air relative humidity.
      
Under such stress conditions, air temperature was the primary factor to affect Tr in July and August and photosynthetically active radiation (PAR) was the primary factor in October.
      
更多          


Following a series of experiments conducted in East China Agricultural Re-search Institute (Nanking) during the past years,the "red arsenic",a well-knownraw-drug (containing approximately 90% of As_2O_3,9% of AS_2S_2 and 1% of mis-cellaneous substances),is found to be acceptable as seed disinfectant for the controlof cereal smuts.This raw-drug is not only excellent in effectiveness,but alsoeasily obtainable in this country. Incidence of infection of wheat bunt in the plots receiving 3 different treatments,namely,red...

Following a series of experiments conducted in East China Agricultural Re-search Institute (Nanking) during the past years,the "red arsenic",a well-knownraw-drug (containing approximately 90% of As_2O_3,9% of AS_2S_2 and 1% of mis-cellaneous substances),is found to be acceptable as seed disinfectant for the controlof cereal smuts.This raw-drug is not only excellent in effectiveness,but alsoeasily obtainable in this country. Incidence of infection of wheat bunt in the plots receiving 3 different treatments,namely,red arsenic (inoculated seed grains dusted at the rate of 0.05 % by weight),copper carbonate (0.3%),ethyl mercury phosphate (0.05%),during the last 4years,averaged 0.2%,1.4% and 2.7%,respectively against 44.8% in the control.The corresponding figures for the flag smut of wheat were respectively 3.1%,0.8%,5.0% against 20.5%; for the covered smut of barley,0.9%,1.1%,0.9% against1.6%; for the kernel smut of oats,6.8%,3.1%,0.5% against 41.4%.The resultsmake us believe that this native raw-drug is not inferior,in some cases even su-perior,to other fungicides now extensively manufactured and considered efficientin preventing the various cereal smuts.But in the control of the covered smut ofbarley,as we have already shown elsewhere,another native raw-drag,sulphur ismore effective.In the last 3 years,field experiments were carried out to studywhether arsenic gives beneficial effect on the germination of seed and on the yieldof grain.Arsenic was applied as dust to the clean seed wheat following thestandard hot water treatment.Data showed that the number of seedlings in asingle 12-ft.row ranged 368-400 from treated seed as compared with 362-386 fromuntreated seed.Yield of grain also increased 4.7 to 23.6 per cent.It is,there-fore,evident that this fungicidal dust,when properly used,is at least not injuriousto seed wheat.The following points,however,must be borne in mind when thearsenic treatment is put into practice: (1) The dosage should not be higher than0.05 per cent and lower than 0.005 per cent by weight of seed grain.Otherwise, ??it would be either injurious to seed germination or ineffective for disease control.(2) Arsenic can be applied only to thoroughly dried seed grain. Seed wheat con-taining 24% of moisture when treatment was made, lost its vitality in a very fewdays, while that with less than 12% moisture can be stored for one month withoutspoilage. (3) Arsenic reduced germination of seed grain after storage at the highertemperatures. Under laboratory conditions, seeds, treated during hot summer whenthe air temperature ranged between 31 and 35℃, largely lost their germinativecapacity within half a month, but seeds, treated in cooler season when air tempera-ture dropped below 22℃, germinated as untreated ones after being stored for 3months or longer. (4) The relative humidity during storage played the most im-portant role in causing arsenic injury to the seeds. Seeds of wheat containingproper moisture (around 12%) dusted with arsenic at correct rate (0.05% byweight), failed to germinate after being stored for 5 days at temperatures above30℃ under 100% r.b.; but there was little or no injury after a storage period ofover 7 months at 37℃ under 18% r.h. (5) The length of storage period is alsoa factor in causing arsenic injury, and at the same time affecting the efficiency ofthe treatment. Seeds dusted with arsenic at a dosage of 0.05% during mid-summer(July of 1953) retained their germinative capacity within 0.5 month, but no seedsgerminated after 2.5 months' storage. On the other hand, almost complete controlof disease was obtained from thoroughly infested seed grain dusted with 0.0125%of arsenic and stored for 60 days, but similarly treated seeds which were sownimmediately, gave 45.15% infection as compared with 72.77% in the check plot.Consequently, the proper method of using arsenic against cereal smuts is to dustthoroughly dried seed grain at the rate of 0.05-0.0125% by weight and to storetreated seeds under cool (below 25℃) and rather dry (around 80% of r.h.) con-ditions for a period of about one month. According to the results obtained from experiments conducted under bothlaboratory and field conditions, it is found that there is no synergism nor antago-nism between arsenic and such filling materials as ashes, slake lime, talc, charcoalpowder, and calcium phosphate; and that neither soil temperature nor soil moistureact as factors influencing the germination of treated seeds.

(一)用紅砒粉末作為種子消毒處理藥劑,對於幼苗感染性的小麥腥黑穗、小麥稈黑穗及燕麥堅黑穗等,有極良好的防治效果。但對大麥堅黑穗及條斑病,則不見功。(二)紅砒使用得法,對於麥種絕對無害;而且對於大麥、小麥的清潔種子,有積極的增產作用;惟對於燕麥還未能肯定。(三)紅砒粉末的拌種用量,當以種子重的0.025—0.05%為準簧僦?.005%,仍有殺菌效果。(四)為了增大藥物的容積,使得微量的紅砒粉末能够均勻週到地沾着每一麥粒,可用滑石粉、木灰末、甚至消石灰、草木灰或過磷酸鈣來稀释。(五)麥種拌砒後,須經一定期間的貯藏後播種,方顯出其强大的殺菌防病效果珉S拌隨種,則效果较少。至貯藏期間的久暫,則當因季節和用量等等而異。大致可以一個月為度。(六)紅砒使用不得其法,易起藥害。而藥害有無的關键,主耍在於拌砒後貯藏中的濕度,其次才是温度。如充分乾燥,在酷暑的氣候條件(37℃)下,貯藏7個月,尚??無妨礙。至於播種時的地温土濕,則關係極微。(七)紅砒的藥害與麥種處理當時的含水量有密切關係.含水量多,極為蝛U;含水量在12%以下,即安全無礙。(八)在自然狀况下用紅砒處理麥種,應當避去炎夏季節。又麥種拌砒前,必須充分晒乾。拌砒後...

(一)用紅砒粉末作為種子消毒處理藥劑,對於幼苗感染性的小麥腥黑穗、小麥稈黑穗及燕麥堅黑穗等,有極良好的防治效果。但對大麥堅黑穗及條斑病,則不見功。(二)紅砒使用得法,對於麥種絕對無害;而且對於大麥、小麥的清潔種子,有積極的增產作用;惟對於燕麥還未能肯定。(三)紅砒粉末的拌種用量,當以種子重的0.025—0.05%為準簧僦?.005%,仍有殺菌效果。(四)為了增大藥物的容積,使得微量的紅砒粉末能够均勻週到地沾着每一麥粒,可用滑石粉、木灰末、甚至消石灰、草木灰或過磷酸鈣來稀释。(五)麥種拌砒後,須經一定期間的貯藏後播種,方顯出其强大的殺菌防病效果珉S拌隨種,則效果较少。至貯藏期間的久暫,則當因季節和用量等等而異。大致可以一個月為度。(六)紅砒使用不得其法,易起藥害。而藥害有無的關键,主耍在於拌砒後貯藏中的濕度,其次才是温度。如充分乾燥,在酷暑的氣候條件(37℃)下,貯藏7個月,尚??無妨礙。至於播種時的地温土濕,則關係極微。(七)紅砒的藥害與麥種處理當時的含水量有密切關係.含水量多,極為蝛U;含水量在12%以下,即安全無礙。(八)在自然狀况下用紅砒處理麥種,應當避去炎夏季節。又麥種拌砒前,必須充分晒乾。拌砒後,必須貯置高燥處所。

The absorption spectra of cadmium sulphide single crystals were observed with natural light and polarized light, one piece of the crystals having a thickness of about 0.1 mm and another about 0.05 mm. At room and liquid air temperatures, the absorption spectra observed with natural light indicate that the wavelength of the long wavelength limit of Cd S depends upon the thickness and the temperature of the crystals. A change of the wavelength of the absorption edge which depended upon the orientation...

The absorption spectra of cadmium sulphide single crystals were observed with natural light and polarized light, one piece of the crystals having a thickness of about 0.1 mm and another about 0.05 mm. At room and liquid air temperatures, the absorption spectra observed with natural light indicate that the wavelength of the long wavelength limit of Cd S depends upon the thickness and the temperature of the crystals. A change of the wavelength of the absorption edge which depended upon the orientation of the electric vector of the polarized light produced by a polaroid plate placed between the crystal and the slit of the spectrograph was observed.

利用CdS单晶体,一块约厚0.1毫米,另一块约厚0.05毫米,观察它们在天然光及偏振光下的吸收光谱。在室温及液态空气温度下,天然光的吸收指示CdS晶体长波吸收边波长随厚度及温度而改变。在光谱仪狭缝前放一偏振片观察到长波吸收边波长随晶体C轴与偏振光电矢量间介角的改变。 在液态空气温度下观察CdS晶体对偏振光的吸收情况,发现在晶体本徵吸收边出现由七条强而锐的谱线组成的一个类氢光谱系。 测量结果发现每条谱线的波数满足下列公式: v_k=20270-11754/k~2(厘米)~(-1),式内k=3,4,5,…9;k=2的线未在光谱中发现。从此式推出的CdS晶体能级的系限加以温度较正为2.41电子伏,与前人用其他方法所得2.42电子伏是很相近的。激子的等价质量与电子质量之比为4.3。 CdS晶体与ZnS晶体结构相似,常数数值相近,由此可以猜测CdS晶体能级的满带可能是属于S-离子。所观察到的激子光谱类氢系可能是S-离子的激发态。

Sweet-potato wilt,a dangerous disease of sweet potatoes,has made itsappearance for more than 10 years in several districts of the south-easternKwangsi and south-western Kwangtung.During recent years it has been found tocause a heavy loss of sweet potato crop in these two provinces. Sweet-potato wilt is a kind of wilt disease which infects the fibrovascular ??bundles of the plant.It begins to infect the vine cuttings and those parts thatare in close contact with the sick-soil.The infected parts first show the...

Sweet-potato wilt,a dangerous disease of sweet potatoes,has made itsappearance for more than 10 years in several districts of the south-easternKwangsi and south-western Kwangtung.During recent years it has been found tocause a heavy loss of sweet potato crop in these two provinces. Sweet-potato wilt is a kind of wilt disease which infects the fibrovascular ??bundles of the plant.It begins to infect the vine cuttings and those parts thatare in close contact with the sick-soil.The infected parts first show the water-soaked appearance and then extend upwardly,and eventually become blackenedand rotted.As a rule,ths leaves of the infected plants show an abnormal coloror pale yellow,and drooping appearance.In the meantime,the root tips of theadventitious roots of the vines lose their cortex and begin to lot.Wilting followsquite rapidly and finally the entire plant dies.If the disease infects the plantafter the potatoes beginning to form,it may extend throughout the vine and in-to the roots,causing the enlarged roots to show brown streaks and finally blackenedand rotted with pungent odor. The cause of the disease may appropriately be considered as due to bacteriaand Fusarium spp.Four types of bacteria,i.e.white smooth type,yellow smoothtype,white rough type and yellow rough type,are able to cause the disease.Atleast four kinds of Fusarium,i.e.white aerial mycelium type,white mycelium withred of a purple tint substratum type,pink mycelium with red of a purple tint sub-stratum type and without aerial mycelium type are responsible for the disease.Which is the main cause of the disease? Either bacteria or Fusarium alone or theboth in combination is able to cause the disease,further tests should be madebefore a definite conclusion may be drawn. The dissemination of the wilt organisms may appropriately be considered inthree ways,namely,(1) by infested roots and vines,(2) by sick-soil,and (3) byinsects,as the sweet-potato weevil (Gycas formicarius Fabr.).The former twoways of dissemination are more definite than the latter,however,further testsand observations should be made. According to the results of 2-years field experiments in Tsen-shi and Peh-liustations,it shows that different varieties of sweet-potato possess different resis-tance to the disease.Among several varieties tested,it is found that Tai-nung No.3being a promising one,because it yields very high and is highly resistant to thedisease and to the drought.Although it is occasionally found to be susceptibleto the disease in the experiment field of Tsen-shi and is more commonly foundin the experiment field of Lin-kwei.The second variety is Tai-nung No.46 dueto its high degree of disease resistance. The results of preliminary tests indicate that the method of reproduction byold vines would decrease both in disease resistance and in yield within the samevariety. From tests conducted in two different fields,i.e.one at dry land and the ??other in the rice field,it shows that the discrepancies were found in the occur-rence of the disease and also in the relation of the method of manuring to thepercent of infection. Dipping cuttings in different disinfectants did not show any significant results.There are discrepancies in both plowed and sunned field test and two methodsof setting the vines test.These may be due to methods of treatment,landand varieties used for experiment being different. According to the results of date of planting tests in Peh-liu,it indicates thatthe occurrence and the development of the disease are closely related to the highhumidity and the high temperature.These climatic factors affect the health ofthe early growth of the plant which in turn would increase the disease resistance.It is suggested that the most suitable date for planting sweet-potato in Peh-liu isin the first decade of August. In comparing the weather records of the three districts—Lin-kwei,Peh-liu andTsen-shi—in relation to the date of early and last occurrences of the disease,itshows that an average air temperature of 23.4-28.4℃ is most suitable for the oc-currence of the disease,and an average relative humidity of 80 per cent is alsoneeded for the infection of the disease.Based on these facts,we may say thatsweet-potatoes in Lin-kwei are capable to be easily infected by the wilt organisms.except the last date of the infection would be preceded 10-20 clays.Any otherregions with similar climatic factors,it is also very possible to be infected. According to the results of 2-years experiments and facts from surveys,sug-gestive control measures are proposed: (1) excluding the disease by regulationthrough the use of quarantines enforced by an inspection station empowered torestrict or eradicate diseased roots and vines to prevent them from becomingsources of infection in disease-free districts; (2) selection of disease resistant varie-ties in combination with cultural practices such as the use of more ash,suitableamount of lime and manure,and suitable date of planting to enable plants toescape or resist the disease.For the present time,we suggest that the use of Tai-nung No.3 in Tsen-shi and Peh-liu may meet the requirement,and promotingthe method of root reproduction in place of an old method of reproduction byrepeating vine cuttings from old vines can prevent the degeneration of the plantand decrease the infection of the disease.

甘薯瘟是一种具有十余年历史的病害,不仅严重地威胁着广西东南部几县的甘薯生产,同时也严重影响了广东西南部和广西毗鄰的几个县的甘薯生产。甘薯瘟是一种枯萎类型的病害,是侵染維管束的脉管病害,首先侵染插条与土壤接触部位,先呈水漬狀,继而变黑腐爛并向上發展,叶色不正常或呈黄色而萎垂。此时薯藤的不定根根尖脫皮并开始腐爛,最后全株枯死。如在結薯块后才受病,除薯藤显现枯萎現象外,可向薯塊發展而呈褐色条斑,最后变黑腐烂,發出刺鼻臭辣气味。瘟薯的病原初步認为是由细菌和镰刀菌所致。细菌中可分为白色粘滑型,黄色粘滑型,白色干绉型和黄色干绉型;鐮刀菌中包括白色气生菌丝型,白色菌丝基層稍呈紫紅色型,粉紅色菌丝基層呈紫紅色型,无气生菌丝型等。但究以哪类为主导,抑系并發性呢?仍須进一步研究。薯瘟病原的傳播,初步認为有三种方式:带病薯块和薯苗,病土,及昆虫(如小象鼻虫等),其中以前二种較为肯定,后一种則仅属可能,仍有待+于进一步試驗观察。甘薯各品种間确具有不同的抗病性能,如台农三号的抗病性較强而产量最高,又能抗旱,台农46号的抗病性最高,但产量則較低,因而台农三号是最有希望的品种,但在岑溪試驗地,会略有發現蔓割病(可能是薯瘟病原之一),临桂試...

甘薯瘟是一种具有十余年历史的病害,不仅严重地威胁着广西东南部几县的甘薯生产,同时也严重影响了广东西南部和广西毗鄰的几个县的甘薯生产。甘薯瘟是一种枯萎类型的病害,是侵染維管束的脉管病害,首先侵染插条与土壤接触部位,先呈水漬狀,继而变黑腐爛并向上發展,叶色不正常或呈黄色而萎垂。此时薯藤的不定根根尖脫皮并开始腐爛,最后全株枯死。如在結薯块后才受病,除薯藤显现枯萎現象外,可向薯塊發展而呈褐色条斑,最后变黑腐烂,發出刺鼻臭辣气味。瘟薯的病原初步認为是由细菌和镰刀菌所致。细菌中可分为白色粘滑型,黄色粘滑型,白色干绉型和黄色干绉型;鐮刀菌中包括白色气生菌丝型,白色菌丝基層稍呈紫紅色型,粉紅色菌丝基層呈紫紅色型,无气生菌丝型等。但究以哪类为主导,抑系并發性呢?仍須进一步研究。薯瘟病原的傳播,初步認为有三种方式:带病薯块和薯苗,病土,及昆虫(如小象鼻虫等),其中以前二种較为肯定,后一种則仅属可能,仍有待+于进一步試驗观察。甘薯各品种間确具有不同的抗病性能,如台农三号的抗病性較强而产量最高,又能抗旱,台农46号的抗病性最高,但产量則較低,因而台农三号是最有希望的品种,但在岑溪試驗地,会略有發現蔓割病(可能是薯瘟病原之一),临桂試驗田也会發生过多次。老藤繁殖会降低同一品种的抗病性和产量,值得我們注意。在旱地和水田不同試驗地上所得結果,可初步说明發病情况很不一致,追肥与不追肥处理的發病率也不一致。藥剂处理种苗效应不显著,翻晒土壤及二种种植法試驗结果不一致,想与試驗方法、試驗地不同和供試品种不同有密切关系。薯瘟的發生与發展和高温潮湿有密切关系,而这些气候因素对于植株的早期生??長壮健及增强抗病性也有关系。初步建議,在北流地区以立秋(8月上旬)种植較为适当。从临桂雁山、北流和岑溪三处的气候記录,和薯瘟开始發生与最后發生日期的記录看来,可以初步說平均气温23.4—28.4℃最适于薯瘟的發生。相对湿度平均在80%以上亦适于本病的發生。由此可見,在临桂雁山地区,薯瘟可能是容易發生的,不过停止發病日期会提早10—20天。其他地区如有相似气温与湿度情况,那也是会發生薯瘟的。根据二年試驗結果和調查所得情况,初步提出防治薯瘟的办法如次:(1)应采取种薯和种苗的檢疫措施,禁止病区的种薯运往無病地区,以防蔓延;(2)选育抗病品种为主,結合先进的栽培管理法;多施草木灰,适当施用石灰,根外追肥,适期种植等,以增强植株的抗病性,避免病害的侵染,保証丰产。目前在岑溪及北流地区,可先推广种植“台农三号”品种,并提倡以薯塊育苗,切勿采用老藤繁殖,以避免植株的衰退,减少薯瘟的發生。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关air temperature的内容
在知识搜索中查有关air temperature的内容
在数字搜索中查有关air temperature的内容
在概念知识元中查有关air temperature的内容
在学术趋势中查有关air temperature的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社