日光温室黄瓜根系分布特征及其对土壤水分环境的响应

Root Characteristics of Cucumber and Its Response with Soil-Moisture in Greenhouse

[目的]为了明确日光温室蔬菜土壤生境调控范围。[方法]分析不同生育期不同土壤水分条件下黄瓜根系垂直分布特征。[结果]不同生育期土壤水分处理对黄瓜根系垂直分布有一定的调节作用,但影响较小;不同处理0～25 cm土层黄瓜根系分布比例均可达全部根重的99%以上,根系的最深分布范围可达30 cm;黄瓜根系分布对土壤水分环境的敏感性存在时期差异,初瓜期根系对水分反应敏感,较低的土壤水分有促使根系向深层发育的趋势。[结论]蔬菜"以水调根"管理具有限制性。调控浅根性蔬菜土壤生境更应关注横向调控措施的实现。

[Objective] The research aimed clarify habitat regulation range of vegetables soil in solar greenhouse.[Method]The characteristics of root vertical distribution of cucumber in different soil moisture conditions and growth stages in greenhouse were studied.[Result]The growth stages and soil moisture treatments had certain effects on the vertical distribution of cucumber roots,but the effect was little.Root distribution ratio of cucumber in 0-25 cm layer of soil reached more than 99% of all root weight.It totally distributed in 0-30 cm shallow soil layer.There was different sensitivity of cucumber roots distribution in different growth stages.In initial fruit stage,the reaction of the roots to soil moisture was sensitive.Low soil moisture promoted root to deepen.[Conclusion]Management of Transfering Root by Water was restricted.More attention should be paid to realize transverse control measures.