查询词典 crop rotation

The selection of N-catch crop and the capacity of nitrate extraction from deep soil layer by catch crop were reviewed in the paper. It also pointed out that combining with N-catch crop in the rotation system had been regarded as a good approach for safe vegetable production.

过量施用的氮肥在自然降水或灌溉水的作用下，可通过径流损失造成地表水水体的富营养化；部分土壤中的NO-3 N可随水向下迁移污染地下水，在地下水环境中仍主要以硝态氮形式

Rapeseed is the best crop for rotation over rice especially in the south of China.

目前，世界油菜发展的趋势是优质化。

Effect of P application on crop yields in rice-wheat rotation .

表5：水稻小麦轮作中施磷对作物产量的影响

Potatoes are a good source of nutrients. And farmers can plant them i n rotation with grain crop s.

马铃薯是很好的营养来源，农民们也可以将其与其他谷类作物交替种植。

"A typical scheme selects rotation crop s from three classifications: cultivated row crop s (e.g., corn, potatoes), close-growing grains (e.g., oats, wheat), and sod-forming, or rest, crop s (e.g., clover, clover-timothy)."

典型的轮作耕种计画是从行间作物、密植的谷类、草根层作物或休闲作物(如车轴草、车轴草－梯牧草)中选择轮作作物。

The effect of rotation payment on rice production is statistically significant in the first crop, however, the effect of set-aside payment on production in the second crop is larger the first crop by four times.

第一期的稻田决策以稻作或轮作为主，故对轮作给付有显著反应，而在第二期的稻田决策则以稻作或休耕为主，且休耕行为具有习惯倾向，其对休耕给付的反应程度要较第一期大上四倍。

Significant differences were observed in the kinetic parameters of test enzymes between continuous cropping of gramineous crops and continuous cropping of or rotation with leguminous crop.

土壤质量与土壤的生物学性质密切相关，种植制度对土壤生物学特性的影响研究对土壤质量管理具有重要的意义。

On the basis of long-term experiment, changes in soil organic C, N and dynamics of soil NO〓-N of cropping systems were investigated in gully area of the Loess Plateau by means of analysis of the 15-year soil samples, crop yield in following crop systems: 1 continuous winter wheat with unmanured , nitrogen, organic manure , phosphorus and organic manure , nitrogen and phosphorus , nitrogen, phosphorus and organic manure , 2 continuous alfalfa, 3 pea-winter wheat rotation, winter wheat-sainfoin rotation, and 4 bare fallow. A model was developed according to the organic C dynamics, and was tested by the long-term experiment.

本文以中国科学院长武试验站的长期试验（始于1985年）为依托，通过对典型处理8-15年的土壤养分、作物产量以及同期降水量等的系统分析，揭示了黄土旱塬区不同种植体系中土壤有机碳、氮的演变规律；阐明了长期施肥条件下土壤硝态氮的迁移积累机理；提出了目前水肥条件下黄土旱塬区冬小麦生产潜力及其提高途径。

Therefore, doing research of the nutrient balance in the loessplateau has its practical signification. Using the long-term rotation and fertilization experiment that disposed in dry land on theloess plateau, the paper has studied nutrients in rainfall import to farmland ecosystem andAmmonia volatilization losses and nutrients disbursal of crop, also estimated the balance ofnutrients in farmland soil.

本文利用设在黄土高原旱地上的长期轮作与施肥试验，主要研究了黄土高原农田生态系统养分的降水带入、作物地上部分的氨挥发损失和作物的养分支出，并进行了 N、P、K 养分平衡评价。

All the results suggested that catching crop and rotation has definite restoration effects on the soil quality under continuously cropping of cucumber, anti the effects of planting crown daisy anti garlic were more significant.

说明填闲和轮作制度对黄瓜连作土壤质量有一定的修复效果，尤以填闲茼蒿和青蒜效果明显。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新