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Studies on Technique of Reducing Methane Emission in a Rice-Duck Ecological System and the Evaluatio
The rice-duck ecological system is one of the major practices of the traditional Chinese agriculture. A study on the eff......
用 L<sub>9</sub>(3<sup>4</sup>)正交设计布置上海郊区单季晚稻氮、磷、钾肥料试验,对所有因素的各种水平搭配与产量作 Fuzzy 分析......
经5年的定位试验,结果表明:稻田年内水旱轮作(二水一早的麦=玉米-稻)的晚稻产量比连作(一旱二水的麦-稻-稻)晚稻产量显著增加,增产幅度为6.54%~15.87%,平均为......