摘要
一、引言研究养分在农田生态系统中的循环,是农业生态学的重要内容之一。对有机肥和无机肥肥效及其对农作物产量的影响曾有过不少研究。虽然大量研究表明有机肥对水稻产量的作用与化肥一样有效,甚至更好,也有许多试验,尤其是一些长期对比试验表明有机肥对作物产量的作用不及化肥,只是使用有机肥的试验小区有很长的残效,连续使用20年家畜肥的小区停肥40年后。
The input and output Of riutrients indicate that paddy fields with application of organic fertilizers have positive surpus in N, P and K,but those with application of inorganic fertilizers have negative balarlce in P and K and a large amount of surplus in N.Field experiment shows that significant higher amount of N was volatnized in the urea trcatment than in the compost treatment. The long-term application of organic fertilizers can rieduce the volatilization loss of N and leaching loss of N and K.but the leaching loss of P seems aggravated in the case.
出处
《生态学杂志》
CAS
CSCD
北大核心
1989年第3期44-48,共5页
Chinese Journal of Ecology
关键词
肥料
稻田
养分循环
organic and inorganic fertilizers, nutrient cycling, paddy field.
