摘要
根据９年的田间定位试验资料，我们分析了９种不同施肥处理黑垆土耕层（０～２０ｃｍ）、古耕层（２０～５０ｃｍ）和垆土层（５０～８０ｃｍ）三层土壤养分的变化。结果表明：施肥对黑垆土剖面养分的影响随深度的增加而减弱，一般为，耕层＞古耕层＞垆土层。不同处理耕层土壤养分差异比较明显，耕层以下土层尽管差异减小，但其养分变化与耕层趋势一致。各层土壤速效养分对照比裸地均有下降。综合评价施肥对黑垆土剖面的培肥效果，ＮＰＭ＞Ｍ＞ＰＭ。
Based on data of 9 years field position test,we analysed the soil nutrient's change ofthree Helu soil layer under different treatments of fertilization.The results showed that the effectof fertilization on Helu soil layer's nutrient decreases with depth increasing(generally,0～20cm>20～50cm > 50～80cm).The nutrient's difference of topsoil is the biggest under differenttreatments,even though the nutrient's difference of the layers below topsoil is on the decrease,but their change tendency is the same as topsoil's.Compared with rare land,available nutrient ofsoil layers under CK are decreased.To evaluate comprehensively,the effect that different treat-ments improved soil fertility is NPM>M>PM.
出处
《水土保持通报》
CSCD
北大核心
1995年第6期28-33,59,共7页
Bulletin of Soil and Water Conservation
关键词
定位施肥
黑垆土
剖面养分变化
position fertilization
Helu soil
nutrient change of soil layers
