行间生草对葡萄园土壤水分含量及贮水量变化的影响

研究葡萄园生草对土壤水分影响,可为葡萄园生草在半干旱地区的应用和推广提供理论依据。在葡萄园种植多年生白三叶草、紫花苜蓿和高羊茅,采用TRIME-FM时域反射仪对生草葡萄园0～80 cm土层进行土壤水分定位观测,采用环刀法对0～60 cm土层土壤物理性状进行测定。结果表明,生草可改善葡萄园土壤物理性状,使0～60 cm土壤容重平均降低8.5%～9.8%,总孔隙度提高11.5%～13.9%。在不同降水年份,葡萄园行间生草均使土壤含水量降低,在2006及2007年,生草使0～80 cm土层土壤含水量平均降低幅度分别为2.3%～7.5%及10.7%～15.9%,在冬季贮水量不足、春季干旱的年份土壤含水量降低幅度较大。生草种类不同,对土壤贮水量及增减量的影响存在差异,紫花苜蓿区土壤贮水量较低。

Effects of cover cropping system on soil moisture content and water storage in a vineyard

Soil water content was closely correlated with application and extent of vineyard cover crop in a semiarid area.A permanent inter-row cover crop of Trifolium repens,Medicago sativa,and Festuca arundinacea in a vineyard was compared with clean tillage.Localized observation of soil moisture content in the 0-80 cm layer with TRIME-FM TDR was carried out in the vineyard,and soil physical characteristics of the 0-60 cm layer were investigated using the cutting ring method.After planting grasses,the soil physical...