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weeds
相关语句
  杂草
    From biodiversity, species diversity of crop, and the relationship of crops and weeds were discussed.
    从生物多样性这一现代研究课题出发,论述了作物种类多样性,作物与杂草关系的意义。
短句来源
    80.2% of weed seeds were in 10-30 cm soil layer by deep tillage,and 19.8% were in 0-10 cm. It was difficult to control weeds as few seeds could sprout and grow below 10 cm soil layer.
    深耕,0~10cm耕层杂草种子占19.8%,10~30cm耕层种子占80.2%,10cm以下土层种子很少萌发出苗,难以根除;
短句来源
    STUDIES ON SOIL FERTILITIES,WEEDS CHANGES AND EFFECTS OF WATER ARID SEQUENTIAL CROPPING PATTERNS IN CONTINUING NON TILLED WINTER PADDY
    冬水田水旱复种连续免耕的效益及土壤肥力和杂草动态研究
短句来源
    Allelopathy of Ageratum conyzoides Ⅷ. Allelopathic Effects of Residues on Peanut and Related Weeds in the Field
    胜红蓟化感作用研究 Ⅷ.植株对花生和相关杂草的田间化感效应
短句来源
    1.1 Five plants species (Agrostis stolonifera, the Lolium perenne, the Cynodon dactylon, the Poa annua and tomato) with Pb tolerance, one plant specie (Asiatic Plantain) with Ni tolerance were selected out from more than 60 species of lawn grasses, crops and weeds collected as seeds and seedlings by micro-plots of field experiments with Pb added. The others died after germination or grew poorly.
    1.1 在试验的前期工作中,我们收集了60余种草坪植物或杂草种子,利用田间微区试验,加入外源铅进行了耐受性研究,初步筛选出四种铅耐性较强的植物,它们是翦股颖、黑麦草、狗牙根和早熟禾和番茄,镍耐性强的植物是车前草。
短句来源
更多       
  杂草
    From biodiversity, species diversity of crop, and the relationship of crops and weeds were discussed.
    从生物多样性这一现代研究课题出发,论述了作物种类多样性,作物与杂草关系的意义。
短句来源
    80.2% of weed seeds were in 10-30 cm soil layer by deep tillage,and 19.8% were in 0-10 cm. It was difficult to control weeds as few seeds could sprout and grow below 10 cm soil layer.
    深耕,0~10cm耕层杂草种子占19.8%,10~30cm耕层种子占80.2%,10cm以下土层种子很少萌发出苗,难以根除;
短句来源
    STUDIES ON SOIL FERTILITIES,WEEDS CHANGES AND EFFECTS OF WATER ARID SEQUENTIAL CROPPING PATTERNS IN CONTINUING NON TILLED WINTER PADDY
    冬水田水旱复种连续免耕的效益及土壤肥力和杂草动态研究
短句来源
    Allelopathy of Ageratum conyzoides Ⅷ. Allelopathic Effects of Residues on Peanut and Related Weeds in the Field
    胜红蓟化感作用研究 Ⅷ.植株对花生和相关杂草的田间化感效应
短句来源
    1.1 Five plants species (Agrostis stolonifera, the Lolium perenne, the Cynodon dactylon, the Poa annua and tomato) with Pb tolerance, one plant specie (Asiatic Plantain) with Ni tolerance were selected out from more than 60 species of lawn grasses, crops and weeds collected as seeds and seedlings by micro-plots of field experiments with Pb added. The others died after germination or grew poorly.
    1.1 在试验的前期工作中,我们收集了60余种草坪植物或杂草种子,利用田间微区试验,加入外源铅进行了耐受性研究,初步筛选出四种铅耐性较强的植物,它们是翦股颖、黑麦草、狗牙根和早熟禾和番茄,镍耐性强的植物是车前草。
短句来源
更多       
  杂草
    From biodiversity, species diversity of crop, and the relationship of crops and weeds were discussed.
    从生物多样性这一现代研究课题出发,论述了作物种类多样性,作物与杂草关系的意义。
短句来源
    80.2% of weed seeds were in 10-30 cm soil layer by deep tillage,and 19.8% were in 0-10 cm. It was difficult to control weeds as few seeds could sprout and grow below 10 cm soil layer.
    深耕,0~10cm耕层杂草种子占19.8%,10~30cm耕层种子占80.2%,10cm以下土层种子很少萌发出苗,难以根除;
短句来源
    STUDIES ON SOIL FERTILITIES,WEEDS CHANGES AND EFFECTS OF WATER ARID SEQUENTIAL CROPPING PATTERNS IN CONTINUING NON TILLED WINTER PADDY
    冬水田水旱复种连续免耕的效益及土壤肥力和杂草动态研究
短句来源
    Allelopathy of Ageratum conyzoides Ⅷ. Allelopathic Effects of Residues on Peanut and Related Weeds in the Field
    胜红蓟化感作用研究 Ⅷ.植株对花生和相关杂草的田间化感效应
短句来源
    1.1 Five plants species (Agrostis stolonifera, the Lolium perenne, the Cynodon dactylon, the Poa annua and tomato) with Pb tolerance, one plant specie (Asiatic Plantain) with Ni tolerance were selected out from more than 60 species of lawn grasses, crops and weeds collected as seeds and seedlings by micro-plots of field experiments with Pb added. The others died after germination or grew poorly.
    1.1 在试验的前期工作中,我们收集了60余种草坪植物或杂草种子,利用田间微区试验,加入外源铅进行了耐受性研究,初步筛选出四种铅耐性较强的植物,它们是翦股颖、黑麦草、狗牙根和早熟禾和番茄,镍耐性强的植物是车前草。
短句来源
更多       
  “weeds”译为未确定词的双语例句
    Study on Effect of Weeds Control Measure to Soil and Water Conservation on Slope Garden
    不同除草处理对经济林果园地水土保持作用的初步研究
短句来源
    Comparison with contrast, covering this film, the temperature within 5 cm land layer is higher 3.3 °C, atmospheric temperature is higher 2.2*C, the translucency ration is higher 1.41% and the output increases about 13.6% and 10.4% respectively. 7. The black film can kill the weeds continuously and stably.
    试验膜5厘米地温比对照高3.3℃,气温比对照高2.2℃,透光率比对照高11.41%;
短句来源
    By obsorbing water amountly and biological desalination, alfalfa can decline the ground water level,improve salinized soil,reduce the runoff of water and soil,it also can decrease the pests and weeds.
    苜蓿通过生物脱盐和大量吸水可降低地下水位,改良盐渍化土壤,减少地表径流量和土壤冲刷量,减轻农作物病虫草害。
短句来源
    It indicates that the compound amino acid chelated mineral elements fertilizer has the characteristic of little quantities,low cost,high rate of repay, not only being able to raise the output of crops,to improve qualites,but also being able to kill baotera and insects,to remove weeds and to decrease the effect of residual pesticide and that it is a new type of fertilizer which has unlimited possiblities.
    复合氨基酸微量元素、稀土元素螯合物具有用量少、成本低、回报率高的特点 ,不但能提高农作物的产量、改善品质 ,还能有效地起到灭菌、杀虫、除草、降低农药残留量的作用 ,是很有发展前途的新型肥料
短句来源
    Soil conductance hardly varied and formation of NO 3 - was inhabited after lime nitrogen is applied, also some pest and virus in soil and weeds could be killed. Yields were raised and quality was improved when it was applied on spinach, soybean and strawberry. N utilization by spinach from lime nitrogen was higher than urea.
    石灰氮可以纠正土壤酸化 ,施用后使盐基浓度不上升 ,并可抑制 NO3-生成 ,减少氮素流失 ,还具有除草、杀灭病虫害的功效 ,在菠菜、大豆、草莓上施用效果优于尿素 ,氮素利用率较高 ,既提高了产量 ,也改善了品质
短句来源
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  weeds
canadensis including length, surface area, volume, and average diameter are greater than for composite exotic weeds.
      
Information on specific features of distribution and activity of introduced species growing feral and accidental weeds in different forest types is presented.
      
Cultivated plants and weeds in fields of the Penza Volga region in the middle ages
      
Geobotanical investigations demonstrated that the transformation of the species composition of herbs from weeds to predominantly meadow plants occurred in five-ten years after the soil was no more used for farming.
      
The algorithm separates the weed area from soil background according to the color eigenvalue, which is obtained by analyzing the color difference between the weeds and background in three color spaces RGB, rgb and HSI.
      
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We have studied on both eco一economic threshold and weeding eco一economic threshold modelling inweed populations in alfalfa spring一sowing fields. The relative formula between weed density and yield lossof alfalfa(on DM basis)was calculated in the study as p=1. 9263+0. 8538Logx, Through our experimen-tation, the weeding eco一economic threshold and its control eco一economic threshold have also been estab-lished.The computed results indicated that when the weed densitv was lower than its eco一economic thresh-old...

We have studied on both eco一economic threshold and weeding eco一economic threshold modelling inweed populations in alfalfa spring一sowing fields. The relative formula between weed density and yield lossof alfalfa(on DM basis)was calculated in the study as p=1. 9263+0. 8538Logx, Through our experimen-tation, the weeding eco一economic threshold and its control eco一economic threshold have also been estab-lished.The computed results indicated that when the weed densitv was lower than its eco一economic thresh-old in alfalfa fields,hence no weed controlling measures should be taken。

本文研究了春播苜蓿地田间杂草的生态经济阈值、生态经济除草阈值,建立了田间杂草密度与苜蓿干草损失率之间的关系;P=1.9263+0.8538LogX。通过试验,建立了田间杂草的生态经济阈值和生态经济除草阈值模型。研究结果指出当春播苜蓿地中田间杂草密度低于其生态经济阈值时,不需要防除。

The experiment was conducted at Luodian experimental site from 1991─1993,in which different cropping patterns with vegetable were compared for paddy,The experimental result indicated that the output value and net output value of the optimum combination of vegetables increased by 52.17%and 55.16%than that of control 1n 1992,and by 43.85%and 43.15%in 1993.It increased utilization rate and producti-vity of land.This optimum treatment also showed low damage of disease and insect pest as well as weed,therefore...

The experiment was conducted at Luodian experimental site from 1991─1993,in which different cropping patterns with vegetable were compared for paddy,The experimental result indicated that the output value and net output value of the optimum combination of vegetables increased by 52.17%and 55.16%than that of control 1n 1992,and by 43.85%and 43.15%in 1993.It increased utilization rate and producti-vity of land.This optimum treatment also showed low damage of disease and insect pest as well as weed,therefore it was proved to be a valuable cropping pattern in paddy field to the local areas.

笔者于1991~1993年,在罗甸县兴隆基点进行了改稻田复种一季早熟蔬菜为连作复种两季蔬菜的试验。试验结果表明:1992年最佳蔬菜组合的亩产值、亩净产值分别比对照增长52.17%、85.16%;1993年最佳蔬菜组合的亩产值、亩净产值分别比对照增长43.85%、48.15%。提高了土地利用率和产出率,减轻病虫和杂草危害,为建立稻田复种轮作制作出了示范。

Experiments with five water arid sequential cropping patterns on continuing non tilled winter paddy were conducted. The results indicated that the rice yield in ridge cul-ture was higher than that in flat culture. The rice yield in continuing non tillage for 2 3 years increased by 6.8%~16.2%as cnmpared with that in non tillage for 1 year.Ofthese patterns. The rice yield in ridge ctilture after cultivating green manure crops or rape,and/or vegetable was the highest. Five autum planting crops in continuing...

Experiments with five water arid sequential cropping patterns on continuing non tilled winter paddy were conducted. The results indicated that the rice yield in ridge cul-ture was higher than that in flat culture. The rice yield in continuing non tillage for 2 3 years increased by 6.8%~16.2%as cnmpared with that in non tillage for 1 year.Ofthese patterns. The rice yield in ridge ctilture after cultivating green manure crops or rape,and/or vegetable was the highest. Five autum planting crops in continuing non tillage for3 years prodticed relatively high yields, and the order of economic profits of the five cropswas vegetable>rape>barley>wheat>green manure crops. The conteiits of organic mate-nals in soil with continuing non tillage for 3 years decreased significantly, but the quanti-ties of N, P and K in soil increased each year.Weeds in the fields with non tillage in thefirst vear were little,but in the secoid year, the occurrence of weeds in the fields trendedto stability.

对冬水田水旱复种连续免耕的研究表明,免耕垄作稻比常规平作稻增产,免耕2~3年比1年的水稻增产6.8%~16.2%,免耕种植绿肥、蔬菜、油菜后的垄作稻产量较高。经济效益依次为蔬菜、油菜、大麦、小麦和绿肥。连续免耕土壤有机质含量明显下降,速效氮、磷、钾逐年提高。免耕1年杂草较少,第2年大发生,其后趋于稳定。

 
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