宁夏贺兰山东麓淡灰钙土与风沙土2种典型土质对葡萄根系冻害的影响

The effects of light Sierozem and Aeolian sandy soil on freezing injury of grape roots at the east foot of Helan Mountain

对贺兰山东麓葡萄栽培区淡灰钙土与风沙土2种典型土质进行冬季温度测试，结果表明，在根系分布层内，冬季风沙土各层温度比淡灰钙土低，低温持续时间长，受冻严重，但深层的温度又高于淡灰钙土．在2种土壤2～30cm土层内，冬季土壤温度有明显日变化，最低温都在-5℃以下．在30cm土层以下，温度日变化不明显，随深度加深，温度升高．在相同土质条件下，葡萄嫁接苗受冻程度比自根苗轻，来年长势好，淡灰钙土比风沙土根系冻害轻．

The temperature in two typical soils at the east foot of Helan Mountain had been measured, the results showed that at the roots distributed layers, the temperature in Aeolian sandy soil was lower and the low temperature duration was longer than that in light Sierozem, so the freezing injury of grape roots in Aeolian sandy soil was heavier. Soil temperature in winter time had obvious daily change from 2 cm to 30 cm soil layers and the lowest temperature was below -5℃, and there was not clear daily change of soil temperature under 30 cm depth, but the temperature increased with the depth of soil layers. With the same soil quality, the freezing injury of graft seedling was lighter than that of self-rooted seedling and its growth performance in the next year was better. The freezing injury of grape roots in Aeolian sandy soil was heavier than that in light Sierozem.