The attempts had demonstrated potential and clearly pointed to a possible sustainable evolution of the cropping system.
这些努力显示了良好的发展潜力，并且明确预示着耕作制度向着可持续性方向的演进。
The study results may provide theoretic basis for drawing up the decision scheme of cropping system in dry-land regions.
研究结果可为制定合理的旱区种植制度决策方案提供理论依据。
Zhongmian 16 is a new cotton variety with higher and constant yield, which is suitable for cotton-wheat double cropping system.
中棉16是适于麦棉两熟的丰产、稳产夏播棉新品种。
The rational cropping system is propitious to solve the conflict between soil fertility and crop season, and can achieve high yield and low cost.
合理耕作轮作，有利于解决地力矛盾和季节矛盾，实现高产、稳产、低成本。
Thus there should be studies for finding an optimal fertilizer schedule based on a cropping system including intercropping systems rather than for a single crop only.
因此，应该研究包括间作在内的种植制度而不仅为某种作物寻找合适的施肥方案。
The most important limiting factor for wheat yield in this cropping system is late planting.
该种植方式中最重要的小麦限产因素是迟播。
Soil denitrification was studied in winter wheat-summer maize rotation cropping system with an aquic cambisol.
在北京潮土上研究了冬小麦-夏玉米轮作体系下土壤氮素反硝化损失。
The results implied that cropping system and water status of previous cropping impacted N2O emission from paddy soil.
轮作制度和前作水分状况极大地影响稻田N2O的排放。
The authors put forward a method of cropping system spatial distribution optimization based on GIS and gene algorithm.
提出了一种以GIS为平台，遗传算法为优化模型的县域种植制度空间布局优化方法。
Application of nitrogenous fertilizer to early rice at the ear primordia stage under the triple-cropping system was studied.
对三熟制早稻用氮素化肥作穗肥进行了研究。
During 1981-1987, the fixed position observation was conducted in different patterns of multiple cropping system of paddy fields.
1981年至1987年，对稻田不同多熟种植方式进行了定位观察。
The others such as previous crops, sowing way for maize, cropping system and the climate were indirect factors, which affected the sowing date or amount of planthopper.
前茬作物、播种方式、耕作制度和气候条件等都通过影响玉米的播期或灰飞虱的发生数量来间接影响当地或当年病害发生的轻重。
The successful experience of spreading a variety to be applied in production should be depend on combining the elite cultivar with cultural technique and cropping system.
一个品种在生产上应用推广的成功需要借助于良种、良法、以及与之适宜的耕作制度的配套。
In the model, the leaf area index (LAI), crop coefficients, and root penetration and distribution were simulated for the winter wheat and summer corn double cropping system.
模型对冬小麦—夏玉米轮作体系作物叶面积指数、作物系数、根系生长与分布进行了模拟。
A field experiment was conducted with rice plants to assess the effects of integrated fertilization on heavy metal balance in soil-rice cropping system and rice hygienic quality.
通过田间试验研究了有机无机肥配施对土壤-水稻系统重金属平衡的影响。
The impact of climatic change on sustained agriculture in China is analysed according to the crop productivity and yield, cropping system, regional agricultural production and production cost.
并从农作物生产力和产量、种植制度、区域农业生产及生产费用等几方面分析了气候变化对中国持续农业的影响。
The historical evolution of tillage system in China can be divided into four stages: abandoning cropping system, fallow cropping system, rotational cropping system, and intensive cropping system.
我国农作制度的历史演进过程大致可以划分为四个时期，即撂荒制、休闲制、轮种制和集约制。
The historical evolution of tillage system in China can be divided into four stages: abandoning cropping system, fallow cropping system, rotational cropping system, and intensive cropping system.
我国农作制度的历史演进过程大致可以划分为四个时期，即撂荒制、休闲制、轮种制和集约制。
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