According to these data , gross income was increased by 2 . 5 to 15 . 3 times in systems where plant nutrients were applied adequately when compared to zero or low input systems 根据这些数据，在这些种植制度下施用适量的养分比不投入或低投入养分的毛收入增加了2 . 5 ~ 15 . 3倍。
Not only should fertilizer recommendations be made more site - specific but also the efficiency of applied nutrients be enhanced with a view to increasing crop yields in cropping systems 不仅施肥推荐应更针对具体地点，而且提高养分利用率也应以提高种植制度中作物产量为目的。
Examples of how intensified cropping systems improve plant nutrition , increase water use efficiency , increase nutrient use efficiency and build soil organic matter are discussed 讨论了集约种植制度和如何改善植物营养、提高水分利用率、提高养分利用率和积累土壤有机质的实例。
Water loaded with nutrients and minerals streaming down from the uplands has been the base of production and welfare in the rice based cropping systems of lowlands for centuries in asia 自高地顺流而下含有养分及矿物质的水一直是亚洲几个世纪以来以水稻为主的低地种植制度下生产和生活的基础。
In the final analysis , maximum yield research and the development of mey cropping systems continue to play a prominent role in meeting world requirements for increasing amounts of food and fiber 最终分析认为，最高产量研究和发展最大经济产量种植制度继续在满足世界增长的衣食需要上大显身手。
Higher yields , improved input use efficiency , lowered production costs per unit , higher net profitability and environmental protection have all resulted from development of these improved cropping systems 高产、改进投入利用率、降低单位生产成本、提高净利润和环境保护都由改进种植制度而来。
The study also discovered that both the present fertilization system based on inorganic n and inorganic p and the present system of continuous cropping of corn had greats effect on balance of soil nutrients 研究还发现，现行的以无机氮磷肥为主的施肥制度和玉米连作种植制度对土壤养分平衡有很大影响。
Six typical small holder （ sh ） and plantation （ pl ） upland cropping systems in se . asia were analyzed with regard to yield and income potential in relation to nutrient inputs （ table 6 ） 我们分析了东南亚6种典型的小农户（ sh ）和种植园（ pl ）旱地种植制度，以揭示养分投入与产量和收入潜力之间的关系（表6 ） 。
Gross incomes from crop production at yield and nutrient input levels shown （ table 7 ） are compared in table 8 with gross incomes achievable within the same cropping system but with zero or low nutrient inputs 表8把表7所列的产量和养分投入水平下作物生产的毛收入与相同种植制度下无养分投入或低养分投入时的毛收入作了比较。
However , in south asia , most farmers grow two or even three crops per year on their land and so it is necessary to take future yield maximization research one step - further so that information can be obtained on maximum yields for a cropping pattern 但在南亚，大多数农民一年种二到三季，因此有必要进行进一步的最高产量研究以获得整个种植制度最高产量的资料。
