摘要： 2012-2013年在河北衡水研究了免耕对夏谷生长发育和产量以及土壤养分、含水量的影响.结果表明:免耕对夏谷的生长有一定的影响,产量较传统旋耕提高7.90%.相对于常规栽培,免耕0~150 cm土壤含水量提高6.71%,其中在0~40 cm土层土壤含水量提高13.40%,具有明显的保水效果;免耕在拔节期、灌浆期、成熟期0~40 cm土层的碱解氮平均含量分别比常规低2.76%,4.72%,4.00%;速效磷平均含量分别较常规高34.22%,31.78%,40.77%;速效钾的平均含量分别比常规低12.90%,9.53%,6.12%;有机质含量分别较常规高3.26%,4.98%,6.16%.免耕0~100 cm土壤NO₃^--N含量在拔节期和成熟期分别比常规高55.15%,70.33%,在灌浆期则低于常规22.82%.

关键词: 谷子, 免耕, 产量, 土壤养分

Abstract: The effect of the no-tillage mantle model of summer millet system on growth,yield and soil environment were studied from 2012 to 2013 year.The results showed that compared with those in conventional tillage,the yield of no-tillage summer millet increased by 7.90%,and the soil layer were higher,the water content of no-tillage in 0-150 cm depth soil were increased by 6.71%,especially in 0-40 cm depth soil the water content were increased by 13.40%.So that is showed that the water content in 0-40 cm soil in no-tillage treatment was significantly higher than in conventional tillage.Compared with conventional tillage,at jointing period,grain filling period and maturing period,the hydrolyzable nitrogen content of no-tillage in 0-40 cm depth soil were reduced by 34.22%,31.78%,40.77%;the available phosphorus content of no-tillage were increased by 34.22%,31.78%,40.77%;the available potassium content of no-tillage were reduced by 12.90%,9.53%,6.12%;the organic matter content of no-tillage were increased by 3.26%,4.98%,6.16%.The NO₃^--N content in 0-100 cm depth soil of no-tillage at jointing period and maturing period were increased by 55.15%,70.33%,but at grain filling period was reduced by 22.82%.

Key words: Foxtail millet, No-tillage, Yield, Soil nutrient

中图分类号: 

• S515.06