【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,表现出较高的土壤养分供给能力更多还原

【Abstract】 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.更多还原