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土地当量比
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  land equivalent ratio
     Land Equivalent Ratio (LER) of spring barley/ spring maize intercropping and spring wheat/ spring maize intercropping were 0.99-1.32 and 1.08-1.41 based on grain yield, and 0.98-1.31 and 1.06-1.42 based on biomass, respectively.
     在大麦/玉米和小麦/玉米间套作生态系统中,以籽粒产量计算的土地当量比(LER)分别为0.99-1.32和1.08-1.41; 以生物学产量计算的土地当量比分别为0.98-1.31和1.06-1.42。
短句来源
     Land equivalent ratio (LER) were 1.29 and 1.33 of non-irrigating and irrigating 60 mm respectively, WUE of intercropping increased 24.86 % and 19.24 % compared with maize monoculture, and increased 14.58 % and 37.25 % compared with pea monoculture.
     不灌水和灌水60mm处理的土地当量比(LER)分别为1.29和1.33,群体水分利用效率不灌水和灌水60mm处理比玉米单作分别提高了24.86%和19.24%,比豌豆单作分别提高了14.58%和37.25%。
短句来源
     【Conclusion】It was found that the land equivalent ratio of sequential cropping,intercropping,and crop rotation is 1.68,1.38 and 1.21.Compared with single cropping,the land use efficiency under different cropping patterns is increased by 68%,38% and 21%,respectively.
     结论复种套作、间混作及轮作的土地当量比分别为1.68、1.38和1.21,三种不同的种植方式土地利用效率较单作分别提高68%、38%和21%。
短句来源
     The land equivalent ratio of wheat and soybean to hedgerow respectively range from 1.07 to 1.11 and from 0.95 to 0.99 in the system, which shows that wheat is a dominant species with more competent than hedgerows and possessing intercropping advantage, and that of the soybean/hedgerow intercropping is not advantageous, but not significant.
     不同间作系统其间作优势不同。 小麦/绿篱间作土地当量比为1.07~1.11,大豆/绿篱间作土地当量比为0.95~0.99,表明小麦/绿篱种植有间作优势,小麦为优势种,竞争力大于绿篱,大豆/绿篱种植虽没有间作优势,但不明显。
短句来源
     The land equivalent ratio of intercropping Ⅰand intercropping Ⅱ were 1.18 and 1.27, respectively (LER>1). It also indicated that improving iron nutrition of peanut intercropped with maize showed remarkable intercropping advantage.
     同时间作方式Ⅰ和间作方式Ⅱ的土地当量比分别为 1.18和 1.2 7(LER >1) ,说明间作改善花生铁营养表现出明显的间作优势。
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  land equivalent
     Land Equivalent Ratio (LER) of spring barley/ spring maize intercropping and spring wheat/ spring maize intercropping were 0.99-1.32 and 1.08-1.41 based on grain yield, and 0.98-1.31 and 1.06-1.42 based on biomass, respectively.
     在大麦/玉米和小麦/玉米间套作生态系统中,以籽粒产量计算的土地当量比(LER)分别为0.99-1.32和1.08-1.41; 以生物学产量计算的土地当量比分别为0.98-1.31和1.06-1.42。
短句来源
     The land equivalent ratios of crude protein yield of whole-crop for N1(187.5 kg.ha-1) and N2(375 kg.ha-1) were 1.54 and 1.77,respectively. And the land equivalent ratios of crude fat yield of whole-crop for N1 and N2 were 1.39 and 2.55,respectively.
     套作体系N1(187.5 kg.ha-1)和N2(375 kg.ha-1)条件下的全株粗蛋白产量的土地当量比分别为1.54和1.77,全株粗脂肪产量的土地当量比分别为1.39和2.55。
短句来源
     Land equivalent ratio (LER) were 1.29 and 1.33 of non-irrigating and irrigating 60 mm respectively, WUE of intercropping increased 24.86 % and 19.24 % compared with maize monoculture, and increased 14.58 % and 37.25 % compared with pea monoculture.
     不灌水和灌水60mm处理的土地当量比(LER)分别为1.29和1.33,群体水分利用效率不灌水和灌水60mm处理比玉米单作分别提高了24.86%和19.24%,比豌豆单作分别提高了14.58%和37.25%。
短句来源
     【Conclusion】It was found that the land equivalent ratio of sequential cropping,intercropping,and crop rotation is 1.68,1.38 and 1.21.Compared with single cropping,the land use efficiency under different cropping patterns is increased by 68%,38% and 21%,respectively.
     结论复种套作、间混作及轮作的土地当量比分别为1.68、1.38和1.21,三种不同的种植方式土地利用效率较单作分别提高68%、38%和21%。
短句来源
     The land equivalent ratio of wheat and soybean to hedgerow respectively range from 1.07 to 1.11 and from 0.95 to 0.99 in the system, which shows that wheat is a dominant species with more competent than hedgerows and possessing intercropping advantage, and that of the soybean/hedgerow intercropping is not advantageous, but not significant.
     不同间作系统其间作优势不同。 小麦/绿篱间作土地当量比为1.07~1.11,大豆/绿篱间作土地当量比为0.95~0.99,表明小麦/绿篱种植有间作优势,小麦为优势种,竞争力大于绿篱,大豆/绿篱种植虽没有间作优势,但不明显。
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  “土地当量比”译为未确定词的双语例句
     1.1574。 In general, the average of LER of Iwpm2:6 was 1.2460, which could raise the soil use efficiency by 24.60%, had obvious relay intercropping advantages.
     研究结果如下:1间套作复合群体的高产高效特性以小麦花生复种为对照,处理Iwpm2:4、Iwpm2:6的效果较好,其土地当量比分别是1.4578、1.3620; 以小麦与玉米复种为对照,处理Iwpm2:6、Iwpm2:8的效果较好,其土地当量分别是1.1299、1.1574。
短句来源
     2 Nitrogen competition and utilization in different inter-planting and relay-planting systems of wheat, peanut and maize and its effects on yield and quality
     但综合考虑,处理Iwpm2:6的土地当量比平均为1.2460,可提高土地利用率分别为24.60%,具有较高的经济效益,是比较好的种植模式。 2不同间套作模式对资源利用的互补和竞争及其对产量和品质的影响
短句来源
     It could be concluded that the patterns of transplanting rape under mixed cropping after tillage and zero tillage had the best physiological and ecological effects,not only increasing rape yield and income,but also improving soil fertility.
     结合产投比和土地当量比,耕翻后与紫云英混作育苗移栽油菜和与紫云英混作免耕育苗移栽油菜两种方式综合效益最高,增产增收,增加有机肥源,提高土壤肥力.
短句来源
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  land equivalent ratio
The biological efficiency of intercropping cowpeas and rice was assessed by calculating the land equivalent ratio of dry matter yield, total N, and uptake of N.
      
The land equivalent ratio ranged between 120% and 180% for shoot dry matter and total N, showing that biological efficiency was increased by intercropping cowpeas with rice.
      
Intercropping gave a significant advantage over sole cropping in terms of dry matter production and grain yield, as calculated on the basis of the land equivalent ratio and area-time equivalent ratio.
      
The land equivalent ratio ranged from 1.03-1.06 for faba bean and from 1.11 to 1.49 for maize intercropping systems.
      
Compared with the respective sole-crop systems, leucaena intercropping did not affect land equivalent ratio (LER), whereas LER increased by 28% with senna intercropping.
      
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  land equivalent
The growth, yield and land equivalent ratios were assessed for pigeon pea, soybean, turmeric and ginger intercropped with Bambusa bambos, in Tamil Nadu, India.
      
The biological efficiency of intercropping cowpeas and rice was assessed by calculating the land equivalent ratio of dry matter yield, total N, and uptake of N.
      
The land equivalent ratio ranged between 120% and 180% for shoot dry matter and total N, showing that biological efficiency was increased by intercropping cowpeas with rice.
      
Intercropping gave a significant advantage over sole cropping in terms of dry matter production and grain yield, as calculated on the basis of the land equivalent ratio and area-time equivalent ratio.
      
The land equivalent ratio ranged from 1.03-1.06 for faba bean and from 1.11 to 1.49 for maize intercropping systems.
      
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The result of a two-year experiment indicated that intercroppingmaize and short-stalked crop (soybean) on the fields of mid-productivelevel (350-400kg/mu) in the alluvial plain area of the Yellow Rivergave a higher or significantly higher maize yield than the solecropped maize with the same maize plant population as sole cropping,the occupied land area reduced to 70O% of the whole, the fertilizerapplied concentratively to the maize-growing rows, and the soilfertility not or basically not lowered. It helped to...

The result of a two-year experiment indicated that intercroppingmaize and short-stalked crop (soybean) on the fields of mid-productivelevel (350-400kg/mu) in the alluvial plain area of the Yellow Rivergave a higher or significantly higher maize yield than the solecropped maize with the same maize plant population as sole cropping,the occupied land area reduced to 70O% of the whole, the fertilizerapplied concentratively to the maize-growing rows, and the soilfertility not or basically not lowered. It helped to resolve the landcompetition between cereal crops and forage crops, vegetable crops,or leguminous crops and promoted the combination of farm cropproduction and animal husbandry and increased the soil productivity. In the fields of mid-or high-productive level (500±kg/mu)without the maize population reduced, the land equivalent ratio(LER), the protein content of products and the net income of theintercropping system were higher than those of the sole croppingsystem. Moreover, the increase in the mid-productive level fields waslarger than that at high level. The intercropping with less row ratioof maize was better than that with more row ratio. The absoluteyields of all intercropping patterns were higher than those of thesole cropping except for that of the pattern with more row ratio ofmaize, in the high productive level fields. Nitrogen fertilizer wouldbe suitable to be added in the mid-productive level fields andphosphorus-nitrogen fertilizer in the high productive level fields.Nitrogen fertilizer would be suitable to be added in the mid-productivelevel fields and phosphorus-nitrogen fertilizer in the high productivelevel fields to the maize rows and nitrogen, phosphate to the soybeanrows in order to stabilize and raise the benefits of the intercroppingpatterns.

在夏玉米亩产350~400公斤水平下,采用玉米与矮秆作物间作,当玉米密度与单作相同,而占地面积缩少到全田的70%左右,肥料集中施用到玉米种植带时,间作的玉米可比单作玉米增产或显著增产,地力不降低或基本不降低,有利于解决农饲、农菜、禾豆等作物之间争地矛盾,促进农牧结合,提高土地生产力,增进经济效益。在玉米亩产350~500公斤水平下,采用玉米密度不减少的间作大豆方式,其土地当量比、全田产品蛋白质和脂肪含量、纯收益皆高于单作,且于下限产量水平提高的幅度大于上限产量水平,玉米少行比的间作方式优于多行比。从全田絕对产量看,除产量高于450公斤的玉米多行比间作方式外,皆高于单作。为稳定和提高间作方式的上述效益,宜对亩产350~400公斤的间作田增施氮肥,亩产500公斤左右吋增施磷、氮肥。

Yield increase and benefit improvement,soil water use,water consumption of the complex system and supplementary water supply effects in the complex wheat corn system were studied on the rainfed highland in the east Gansu Province during the years of 1991~1995.The results showed in the following:(1)the complex wheat corn system had the great advantages of yield increase and benefit improvement and intensive use of water resources so that the land...

Yield increase and benefit improvement,soil water use,water consumption of the complex system and supplementary water supply effects in the complex wheat corn system were studied on the rainfed highland in the east Gansu Province during the years of 1991~1995.The results showed in the following:(1)the complex wheat corn system had the great advantages of yield increase and benefit improvement and intensive use of water resources so that the land equivalent ratio and the income equivalent ratio were 1.215 and 1.199 respectively.(2)Total value of wheat marginal effect in the system reached 94.9%~144.5%,whose supplementary water supply ratio reached 18.9%~28.9%.(3)The competitive use for soil water by wheat was the main cause resulting in serious water stress to corn plant.Water consumption of the system was less than the accumulative by mono cultutivation of wheat and corn.The amount of water stress in the system ranged from 110.2mm to 151.8mm.and (4)Supplementary water supply to corn root zone can improve corn yields by a wide margin,but supplementary water supply effects varied greatly in the rainfall year types.

1991~1995年研究了陇东旱原冬小麦玉米组合系统的增产增收、土壤水分利用、组合耗水量及补偿供水效应。结果表明:(1)小麦玉米组合系统具有增产增收和水资源集约利用的优势,土地当量比,收益当量比分别达到1.215、1.199。(2)在组合系统中,冬小麦边行优势总值达到94.9%~144.5%,其补偿率为18.90%~28.99%。(3)冬小麦对土壤水分的竞争利用是玉米带土壤水分不足的主要原因,系统组合耗水量明显小于小麦、玉米单作耗水量的累加值,水分缺额110.2~153.8mm。(4)玉米根际补偿供水具有明显的增产效果,但供水效应不同降水年型之间差异较大

A newly-bred specially

本试验选用新近育成的特早熟春大豆在棉田早期间作,以探讨这一复合群体的生物学及其在生产、经济上的适应性。结果表明:本试验所形成的复合群体在作物生育期、植株高度、植株横向生长及田间叶面积指数发展等方面相互之间均存在良好的相互适应以及整体对本地综合生态环境的良好适应,取得了土地当量比为1.96的效果,在生产和经济上均具有明显的优越性和可行性。

 
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