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soil pathogen
相关语句
  土壤病原菌
     Selection and Study on Biological Characteristic of Antagonistic Strains Against Soil Pathogen in Continuous Cropping Systems of Soybean
     连作大豆土壤病原菌拮抗菌株的筛选及其生物学特性研究
短句来源
     Study on Isolation and Pathogenicity of Soil Pathogen in Continuous Cropping Systems of
     连作大豆土壤病原菌的分离及其致病性的研究
短句来源
  “soil pathogen”译为未确定词的双语例句
     In the plant without germ in the seed lotus, but with germ in the soil, pathogen invade from lotus whip wound or section department to the vascular bundle, and when condition is suitable, expand forward, then endanger the products organ.
     种藕不带病菌,但土壤带病原菌者,病原菌从莲鞭伤口或节部伤根部位入侵到达维管束,条件适宜时向前扩展,进而危害产品器官。
  相似匹配句对
     Influence of Pathogen Amount in Soil to Speed of Pepper Blight
     环境菌量对辣椒疫病发病速率的影响
短句来源
     Antagonistic Activity of Chitosan to Soil-borne Pathogen of Vegetable
     壳聚糖对蔬菜土传病原菌的拮抗作用
短句来源
     Soil Age
     土壤的年龄
短句来源
     MANGROVE AND IT'S SOIL
     红树林及其土壤
短句来源
     Pathogen was S. sonnei.
     致病菌为宋内氏志贺氏痢疾杆菌 ;
短句来源
查询“soil pathogen”译词为用户自定义的双语例句

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  soil pathogen
Sclerotium rolfsii, a destructive soil pathogen common in tropical soils, was found to cause stipe rot of the fruit bodies ofPleurotus tuber-regium.
      
An increase in the soil pool of Trichoderma harzianum as a result of application of a biological preparation based on this antagonistic fungus correlated with its effectiveness against the soil pathogen Fusarium sp., which causes root rot.
      
The analysis of the spectrum of soil pathogen species was carried out after different ways of winter wheat cultivation.
      
Pilot studies have shown that these and other nematodes may be involved in soil pathogen systems as vector of fungal propagules.
      
Based on these figures, it is concluded that the cost of MI is relatively low compared to most other commonly used products for soil pathogen control.
      
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To clarify regenerative traits and explore effects of canopy cover, density, distance, dispersers, or predators on fates of seeds or seedlings of Phoebe bournei , fruit fall, seed bank, seed dispersal, fruit/seed predation, seed germination and seedling survival were examined in a mid\|subtropical evergreen broadleaf forest in Luoboyan Nature Reserve, southeastern China. Fruit production averaged 116 fruits/m 2 between 1995 and 1996, and 103 fruits/m 2 between 1997 and 1998. The peak of fruit ripening appeared...

To clarify regenerative traits and explore effects of canopy cover, density, distance, dispersers, or predators on fates of seeds or seedlings of Phoebe bournei , fruit fall, seed bank, seed dispersal, fruit/seed predation, seed germination and seedling survival were examined in a mid\|subtropical evergreen broadleaf forest in Luoboyan Nature Reserve, southeastern China. Fruit production averaged 116 fruits/m 2 between 1995 and 1996, and 103 fruits/m 2 between 1997 and 1998. The peak of fruit ripening appeared in mid\|January, 1996, and in mid\|December,1997. Most fruits(90 1%) fell directly from parent trees and less than 9 5 per cent were disseminated by birds between 1997 and 1998. Field and laboratory germination rate differed sharply with 93 0 per cent in laboratory compared to 12 per cent in the field. Poor field germination rate was mainly due to rotted seeds attacked by soil pathogens. Phoebe did not have a persistent seed bank strategy. Its seeds germinated in early April and were inviable after July. Predators affected not only seed survival, but seedling mortality as well. The number of predated fruits or lost seedlings in the unprotected plots differed significantly from that in the protected plots. Recent gaps or far distance from parent trees reduced fruit removal and seedling mortality, but their interaction was not always the case. Density dependence occurred in the very young seedling stage(about 2~3 months),but did not significantly affected fruit predation or mortality of seedlings more than 3 months. These results indicate that Phoebe seeds or seedlings suffer high environmental pressures, i.e., most seeds near parent trees in high moist habitats are susceptible not only to soil pathogens, but to high predation beneath parent trees′canopy as well, which results in poor field seed germination and seedling survival.

从 1 995至 1 998年 ,通过种子收集器布设、不同程度圈围的样方处理、实验室和野外发芽实验、相邻格子样方调查和土壤中种子的筛选等一系列方法 ,对福建罗卜岩闽楠种质资源保护区内闽楠为优势的常绿阔叶林群落中闽楠种群的果实、种子库、种子散布、果实 /种子捕食、种子萌发和幼苗存活等进行了研究。结果表明 :1 995至 1 996年果实量为 1 1 6个 /m2 ,成熟高峰期在 1 996年 1月中旬。 1 997至 1 998年为 1 0 3个 /m2 ,成熟高峰期在 1 997年 1 2月中旬。 1 997至 1 998年 ,绝大部分 (90 .1 % )的果实直接从母树上掉落 ,低于 9.5 %的果实由鸟类传播。实验室的种子发芽率为 93 % ,而在野外仅为1 2 %。野外发芽率低多由种子霉烂引起。闽楠的种子寿命较短 ,其种子在次年 4月初开始萌发 ,7月之后地面种子即丧失活力。动物捕食不仅影响种子的存活 ,同时也影响幼苗的死亡率 ,未经圈围与圈围的样地中被取食的果实和幼苗数量有显著差异。在新近形成的林窗中或远离母树均降低了果实的迁移和幼苗的死亡率。但各因素交互作用有所不同。密度相关效应发生在 2~ 3个...

从 1 995至 1 998年 ,通过种子收集器布设、不同程度圈围的样方处理、实验室和野外发芽实验、相邻格子样方调查和土壤中种子的筛选等一系列方法 ,对福建罗卜岩闽楠种质资源保护区内闽楠为优势的常绿阔叶林群落中闽楠种群的果实、种子库、种子散布、果实 /种子捕食、种子萌发和幼苗存活等进行了研究。结果表明 :1 995至 1 996年果实量为 1 1 6个 /m2 ,成熟高峰期在 1 996年 1月中旬。 1 997至 1 998年为 1 0 3个 /m2 ,成熟高峰期在 1 997年 1 2月中旬。 1 997至 1 998年 ,绝大部分 (90 .1 % )的果实直接从母树上掉落 ,低于 9.5 %的果实由鸟类传播。实验室的种子发芽率为 93 % ,而在野外仅为1 2 %。野外发芽率低多由种子霉烂引起。闽楠的种子寿命较短 ,其种子在次年 4月初开始萌发 ,7月之后地面种子即丧失活力。动物捕食不仅影响种子的存活 ,同时也影响幼苗的死亡率 ,未经圈围与圈围的样地中被取食的果实和幼苗数量有显著差异。在新近形成的林窗中或远离母树均降低了果实的迁移和幼苗的死亡率。但各因素交互作用有所不同。密度相关效应发生在 2~ 3个月的幼苗阶段 ,之后 ,密度高低对果实被取食和幼苗死亡没有显著的影响。这些结果表明 ,闽楠种子和幼苗经历较大的环境压力 ,即在高湿度生境中母树树冠下的种

Subalpine coniferous forests dominate most parts of the forested areas in western Sichuan, including the upper reaches of the Yangtze River. Since the 1940s, natural coniferous forests have been cleared, and Picea asperata is an important species used for reforestation. Up to now, a total of ca. 13000 hm2 of plantations have been planted with this species in this region. Hence, studies on seed source, dynamics of the soil seed bank and seedling survival of Picea asperata populations are of significance...

Subalpine coniferous forests dominate most parts of the forested areas in western Sichuan, including the upper reaches of the Yangtze River. Since the 1940s, natural coniferous forests have been cleared, and Picea asperata is an important species used for reforestation. Up to now, a total of ca. 13000 hm2 of plantations have been planted with this species in this region. Hence, studies on seed source, dynamics of the soil seed bank and seedling survival of Picea asperata populations are of significance for the management and conservation of coniferous forest ecosystem. The seed rain and soil seed bank of spruce plantations that were 20, 30, and 60 years old and a 150 years old natural spruce forest in the Miyaluo subalpine coniferous forest in western Sichuan, China were studied using seed traps, sieving and counting seeds in the soil, conducting seed germination experiments, and measuring seedling density in the three plantations and the forest. The area is located on a high mountain valley in the transitional zone between the Qinghai-Tibet plateau and the Sichuan basin. The results showed that seed rain lasted from early October to the end of January. The intensity of seed rain of the different aged plantations increased in the following order; 20 years old plantation ((66.73±5.71) seeds·m-2)soil seed bank of the 30 years old, and 60 years old plantations and natural spruce forest at two sampling periods was (507. 2±40. 32) and (267.6±25.14), (1065.6±88.06) and (872.8±77.12), (472.8±20.82) and (185.5±22.48) seeds·m-2, respectively. The vertical distribution of seeds in the soil bank showed that about 66% of the total seeds were distributed in the litter layer, 24% in the 0-2 cm layer and 10% at 2-5 cm depth. By August 21, 2003, all of the spruce seeds had lost viability in the soil, and the number and proportion of decayed seeds and vacant seeds greatly increased. Seed decay from soil pathogens and seed-predation by animals were the most important factors affecting soil seed bank dynamics. The proportion of seeds removed from the soil seed bank via germination was quite low. The spruce soil seed bank belongs to the type II as defined by Thompson and Grime, namely, the soil seed bank only existed in winter and germinated in spring. There were significant differences in the seedling density in the 30 years old plantation ((28.57±6.39) seedlings·m-2) 60 years old plantation ((39.42±16.21) seedlings·m-2) and natural spruce forest ((10.75±2.37) seedlings-m-2). Seedling mortality was high due to poor habitat quality. The recruitment potential increased with plantation stand age, but the recruitment potential of spruce plantations were higher than that of natural spruce forests when seed rain, soil seed bank and seedling number were considered together. In Miyaluo spruce woodlands in western Sichuan, China, despite high seed production, the number of spruce seedlings recruited from the seed to seedling stage was relatively few.

对川西米亚罗亚高山20、30、60年人工云杉(Picea asperata)林及天然林的种子雨和土壤种子库进行了研 究。结果表明:该区云杉种子雨一般从每年的10月初开始下落,一直到翌年的1月底结束,但不同林龄的云杉种子 雨强度不同,60年人工林种子雨量最大,然后依次为30年人工林、天然林、20年人工林,其大小分别为(1088.16± 52.34)粒·m-2、(973.45±63.12)粒·m-2、(579.99±28.93)粒·m-2、(66.73±5.71)粒·m-2。云杉降雨历程与其林龄 大小也有一定的关系,表现在种子雨发生时间和降雨高峰期的不同。30、60年人工云杉林及天然林下土壤种子库 存在显著差异,两次取样(2003年3月26日和2003年8月21日)土壤种子库大小分别为(507.2±40.32)粒·m-2和 (267.6±25.14)粒·m-2、(1065.6±88.06)粒·m-2和(872.8±77.12)粒·m-2、(472.8±20.82)粒·m-2和(185.5± 22.48)粒·m-2。土壤种子库中云杉种子主要都集中在枯枝落叶层,占66%左右,0-2 cm层占24%左右,2-5 cm层...

对川西米亚罗亚高山20、30、60年人工云杉(Picea asperata)林及天然林的种子雨和土壤种子库进行了研 究。结果表明:该区云杉种子雨一般从每年的10月初开始下落,一直到翌年的1月底结束,但不同林龄的云杉种子 雨强度不同,60年人工林种子雨量最大,然后依次为30年人工林、天然林、20年人工林,其大小分别为(1088.16± 52.34)粒·m-2、(973.45±63.12)粒·m-2、(579.99±28.93)粒·m-2、(66.73±5.71)粒·m-2。云杉降雨历程与其林龄 大小也有一定的关系,表现在种子雨发生时间和降雨高峰期的不同。30、60年人工云杉林及天然林下土壤种子库 存在显著差异,两次取样(2003年3月26日和2003年8月21日)土壤种子库大小分别为(507.2±40.32)粒·m-2和 (267.6±25.14)粒·m-2、(1065.6±88.06)粒·m-2和(872.8±77.12)粒·m-2、(472.8±20.82)粒·m-2和(185.5± 22.48)粒·m-2。土壤种子库中云杉种子主要都集中在枯枝落叶层,占66%左右,0-2 cm层占24%左右,2-5 cm层 占10%左右。到8月21日,土壤中所有云杉种子都失去活力,腐烂死亡和动物取食是种子库损耗的主要因素。云 杉种子库属于Thompson和Grime定义的第Ⅱ类。该区云杉幼苗一般在6月初开始出现,6月中旬左右达到出苗高 峰,3种云杉林下幼苗密度差异很大,60年人工林下幼?

Methyl bromide is listed as one of the ozone depleting substances (ODS) in the Montreal Protocol and going to be phased out in developing countries in 2015 according to Copenhagen Amendment. A China-Italian cooperative project, Transfer of alternative technologies to the use of methyl bromide and capacity building in soil fumigation (strawberry sector), funded by Italian Ministry for the Environment and Territory was implemented in Mancheng County, Hebei Province. The treatments included metham sodium...

Methyl bromide is listed as one of the ozone depleting substances (ODS) in the Montreal Protocol and going to be phased out in developing countries in 2015 according to Copenhagen Amendment. A China-Italian cooperative project, Transfer of alternative technologies to the use of methyl bromide and capacity building in soil fumigation (strawberry sector), funded by Italian Ministry for the Environment and Territory was implemented in Mancheng County, Hebei Province. The treatments included metham sodium (MS) 35g/m~2, MS 26.25g/m~2+VIF (virtually impermeable film), solarization+biological control agent (BCA) 10g/m~2, methyl bromide (MB) 50g/m~2 and 55g/m~2 , MB 37.5g/m~2+VIF and MB 41 g/m~2+VIF, resistant cultivars and untreated control (CK). The results showed that MS and MS+VIF applied through chemgation were the most promising alternatives to MB. The yields of MS and MS+VIF treatments on c.v. Darselect were 26[KG*5]816kg/hm~2 and 23[KG*5]672kg/hm~2, respectively, while the yield of MB treatment was 28[KG*5]346kg/hm~2. The yield of MS and MS+VIF on c.v. Idea were 19[KG*5]844kg/hm~2 and 15[KG*5]989kg/hm~2, while the yield of MB treatment was 19[KG*5]657kg/hm~2 in 2001-2002. The yields of MS and MS+VIF treatments on c.v. Darselect were 23[KG*5]073kg/hm~2 and 23[KG*5]446kg/hm~2, respectively, while the yield of MB treatment was 25[KG*5]285kg/hm~2. The yield of MS and MS+VIF on c.v. All star were 29[KG*5]594kg/hm~2 and 27[KG*5]677kg/hm~2, while the yield of MB treatment was 32[KG*5]191kg/hm~2 in 2002-2003. There were no significant differences in the tested alternatives from the yield obtained by MB treatment according to statistic analysis. VIF reduced MB emission. Low dosage of MB with VIF by hot gas system did not show any significant difference from normal MB dosage with polyethylene munching in yield and the vigor of strawberry. Solarization+BCA gave higher yield than the untreated control, but it was significantly lower than that from plots treated with MB. It can not be used as an alternative to MB. Resistant c.v. Idea imported from Italy and local c.v. All star did not show good resistance to local soil pathogens, which had more collapsed plants with low yield compared to c.v. Darselect, which showed some resistance to soil pathogens. The yield, however, in MB, MB+VIF, MS, MS+VIF treated plots was higher than that of the untreated ones.

溴甲烷是一种消耗臭氧层的物质,根据《蒙特利尔议定书哥本哈根修正案》,发展中国家将于2015年淘汰。在我国溴甲烷消费量最大的地区,河北省满城县实施了中-意“溴甲烷土壤消毒替代技术及能力建设项目”。试验结果表明:威百亩和威百亩+VIF,采用化学灌溉技术施药,是有前景的溴甲烷替代品,2001~2002年威百亩和威百亩+VIF处理“达赛莱克特”品种的产量分别为26816kg/hm2和23672kg/hm2,而溴甲烷处理的产量为28346kg/hm2;威百亩和威百亩+VIF处理“理念”品种的产量分别为19844kg/hm2和15989kg/hm2,而溴甲烷处理的产量为19657kg/hm2;2002~2003年威百亩和威百亩+VIF处理“达赛莱克特”品种的产量分别为23073kg/hm2和23446kg/hm2,而溴甲烷处理的产量为25285kg/hm2;威百亩和威百亩+VIF处理“全明星”品种的产量分别为:29594kg/hm2和27677kg/hm2,而溴甲烷处理的产量为32191kg/hm2。产量结果经统计分析表明,威百亩、威百亩+VIF与溴甲烷均无显著差异。溴甲烷+VIF采用热法施药,其产量与溴甲烷无明显差异,...

溴甲烷是一种消耗臭氧层的物质,根据《蒙特利尔议定书哥本哈根修正案》,发展中国家将于2015年淘汰。在我国溴甲烷消费量最大的地区,河北省满城县实施了中-意“溴甲烷土壤消毒替代技术及能力建设项目”。试验结果表明:威百亩和威百亩+VIF,采用化学灌溉技术施药,是有前景的溴甲烷替代品,2001~2002年威百亩和威百亩+VIF处理“达赛莱克特”品种的产量分别为26816kg/hm2和23672kg/hm2,而溴甲烷处理的产量为28346kg/hm2;威百亩和威百亩+VIF处理“理念”品种的产量分别为19844kg/hm2和15989kg/hm2,而溴甲烷处理的产量为19657kg/hm2;2002~2003年威百亩和威百亩+VIF处理“达赛莱克特”品种的产量分别为23073kg/hm2和23446kg/hm2,而溴甲烷处理的产量为25285kg/hm2;威百亩和威百亩+VIF处理“全明星”品种的产量分别为:29594kg/hm2和27677kg/hm2,而溴甲烷处理的产量为32191kg/hm2。产量结果经统计分析表明,威百亩、威百亩+VIF与溴甲烷均无显著差异。溴甲烷+VIF采用热法施药,其产量与溴甲烷无明显差异,但溴甲烷+VIF能减少溴甲烷25%的用药量。太阳能消毒+生物防治制剂的产量高于空白对照,有一定的防病增产效果,但显著低于溴甲烷处理的产量,不能作为溴甲烷的替代品。进口品种“理念”和当地主栽品种“全明星”对土传病害的抗性较差,在长势、产量方面均显著差于新引进品种“达赛莱克特”。虽然“达赛莱克特”对土传病害有一定的抗性,但与溴甲烷和威百亩处理区比较,空白对照区的产量仍显著低于药剂处理区的产量。

 
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