农田生态系统杂草的养分和水分效应研究  

Ecological Effects of Weeds on Soil Water and Soil Nutrient in Farmland Ecosystem

作　　者：张磊[1] 欧阳竹[1] 董玉红[1] 张志诚 潘国艳[1] 

机构地区：[1]中国科学院地理科学与资源研究所 [2]国家动物流行病学中心,山东青岛266032

出　　处：《水土保持学报》2005年第2期69-72,113,共5页Journal of Soil and Water Conservation

基　　金：科技部重大基础 (973)前期研究专项项目"我国北方农田生态系统水;碳;氮耦合机制和环境效应研究" (2 0 0 3CCB0 0 1 )资助

摘　　要：通过田间试验研究了冬小麦田杂草的土壤养分和水分效应,发现田间保留一定量的杂草能够提高表层土壤水分含量,尤以0 2 0cm层次表现明显,显示出很好的土壤水分保持效应。同时在保留杂草的处理中,0 6 0cm土壤碱解氮储量消耗最少,速效P储量在增加,而速效K储量增加得最多。并且在冬小麦返青期不论土壤养分情况怎么样,在收获后都以保留杂草的处理土壤速效养分(碱解氮、速效磷和速效钾)储量最高。Ecological effects of weeds on soil water and soil nutrient were studied in winter wheat. The results showed that weeds, in winter wheat farmland, raised soil water content, especially in 0~20 cm profile. Moreover, in 0~60 cm profile, the loss of available-N was the least and the total amount of available-P was increased (comparatively, other treatment's were decreased) and available-K increment was the maximum in WK(weeds keep) treatment. Furthermore, the total amount of nutrient(available-N,P and K) of WK treatment was the most in harvest period.

关 键 词：农田生态系统 效应研究 土壤水分含量 土壤养分 冬小麦田杂草 土壤速效养分 土壤碱解氮 水分效应 试验研究 水分保持 储量增加 供给能力 速效K 速效P 返青期 速效钾 速效磷 田间 

分 类 号：S181[农业科学—农业基础科学] TQ441.41[化学工程—化学肥料工业]