摘要
通过１９９１～１９９５年定位模拟试验研究，比较当前生产上运用的几种轮作体系的利弊、优劣。确定粮豆产量较高的轮作体系，经济效益较好的轮作体系，高产值、高效益的作物。明确不同轮作体系各作物养分投入产出情况及土壤养分变化。结果表明：生产上运用的轮作体系中，玉米—大豆—小麦—甜菜、亚麻是高粮豆产量型的轮作体系，玉米—大豆—甜菜、亚麻—大豆是高效益型的轮作体系。高效益作物是玉米、甜菜。通过试验中前茬后作产量、效益分析得出，最佳轮作体系是玉米—大豆—甜菜、亚麻，以及玉米—大豆—玉米—甜菜、亚麻。此两种轮作体系的粮豆产量比目前生产上高产量型的轮作体系高２０．３～３６．５％。经济效益比目前生产上高效益型的轮作体系高１４．３～１５．２％。
From 1991 to 1995, advantages and disadvantages of various rotating systems were compared by site simulation experiments. High-production and high-benefit rotating system and high value crops have been determined; also, inputs and outputs as well as nutrient changes in rotating systems have been identified. The results show that rotation of corn -soybean-wheat-sugarbeet or flax belongs to high-production system; rotation of cornsoybean-sugarbeet or flax-soybean belongs to high-benefit system i corn and sugarbeet are high-benefit crops. The experiments also show that the best rotating systems are corn-soybean-sugarbeet or flax and corn-soybean-corn-sugarbeet or flax. The grain yield and economic benefit of the two systems are 20. 3￣36. 5% and 14. 3￣15. 2% higher than that of existing high-production system, respectively.
出处
《黑龙江农业科学》
北大核心
1996年第1期22-26,共5页
Heilongjiang Agricultural Sciences
基金
国家"八五"科技攻关项目
关键词
轮作体系
产量
效益
黑土
Rotation system, Output, Output value, Benefit
