黄绵土长期施肥后效及对土壤水分的影响  

The Residual Effect of Long-term Fertilization and Its Affection onSoil Nutrient in Loessal Soil

作　　者：郑剑英[1] 赵更生[1] 吴瑞俊[1] 

机构地区：[1]中国科学院西北水土保持研究所,水利部西北水土保持研究所

出　　处：《水土保持学报》1994年第2期85-90,共6页Journal of Soil and Water Conservation

摘　　要：在６年长期施Ｎ、Ｐ、Ｍ、ＮＰ、ＭＮ、ＭＰ和ＭＮＰ的土壤上，连续种植一季谷子和两季小麦，研究长期施肥对后茬作物产量和吸Ｎ，Ｐ量的反映及Ｎ，Ｐ养分在作物体内分布情况，盆栽试验结果表明，磷肥、有机肥单施或与其它肥料配施均有后效，纯施Ｎ肥没有后效，而且影响和限制了后茬作物的生长和发育，Ｐ肥的后效最多能维持３年，有机肥后效仅能维持一年，经过三料作物吸收，其土壤有机质、全Ｎ、速效Ｐ和喊解Ｎ均有所降低。The influence of long-term fertilization on crops yield,nitrogen and phosphorus content and its distribution in crops have sttidied based on the planting wheat and millet in the soil applied succes-sively N,LNP,M,MN,MP and MNP for 6 years. ot experiment results show that except pure ni- trogen ,others have the residual effeet ,pure nitrogen fertilizer application not only has not the residualeffect fertilizer but also impact and limites the following crops growth ,residual effect of phosphorusfertilizer can keeps 3 years on following crops ,and organic fertilizer only keeps a year. After winterwheat and millet absorbed nutrient from soil ,organic matter ,totaI nitrogen ,availible nitrogen andphosphrus in soil decreased yearly.

关 键 词：施肥 黄绵土 土壤含水量 效应 

分 类 号：S147.2[农业科学—肥料学]