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根系分区交替滴灌条件下葡萄根系分布特征及生长动态

Keywords: 交替灌溉,葡萄根系,生长动态,微根管

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Abstract:

采用原位取土法和根系生态监测系统连续两年研究了葡萄的根系空间分布和全生育期根系生长动态,结果表明:葡萄根系在水平方向主要分布在距离树干100cm的范围内,占到总根系的80%以上,而且在径向方向呈指数衰减;葡萄根系在垂直方向主要分布在0~60cm范围的土层内,占到总根系的75%以上。根系分区交替滴灌条件下干燥区与湿润区根系生长是不同的,葡萄的新生根系受到土壤水分条件的限制和自身生长的影响。在整个生育期,葡萄根系分区交替滴灌两侧根系生长均呈抛物线变化。

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