摘要
对在不同肥料结构条件下，双季稻田中随水流输入和输出的养分数量进行研究。结果表明：水流中养分的输出多于输入，其亏损趋势是钾＞氮＞磷；早稻期间养分输出多于晚稻，外排水是造成早稻期间养分亏损的主要原因；施用绿肥和稻草还田能显著减少氮素的输出，从而起到保氮作用。
Under the conditions of different fertilizer structure,the input and output of nutrientquantity carried by water- flow into or out of double-rice field have been studied. The resultsshow that:(1)In the water-flow, the output nutrient is more than the input nutrient.The trend ofthe losses is:K > N > P,(2 ) The nutrient output quantity during the early- rice growth ismore than that during the rate-rice growth.(3)Out-drain is the main cause of nutrient lossesduring the growth of early-rice. (4) Returnng green manure and rice straw into field soil candecrease the output of nitrogen,which benefits the maintenance of nitrogen,
出处
《江西农业大学学报》
CAS
CSCD
1994年第4期328-332,共5页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金
关键词
水稻
稻田
肥料
肥料结构
养分平衡
水流
the structure of fertilizer
nutrient equivalency
water-flow
