分蘖洋葱根系分泌物对黄瓜幼苗土壤养分及土壤酶活性的影响

Effects of Root Exudates of Tillering Onion on Cucumber Soil Nutrients and Enzyme Activities

以不同化感潜力的分蘖洋葱为供体,黄瓜为受体,研究了分蘖洋葱根系分泌物对黄瓜幼苗土壤养分和土壤酶活性的影响。结果表明,不同化感潜力的分蘖洋葱根系分泌物总体提高了黄瓜幼苗根际土壤碱解氮、有机质、速效磷和速效钾含量,说明分蘖洋葱根系分泌物对黄瓜幼苗土壤养分含量的增加具有促进作用,化感潜力强(L06)、根系分泌物浓度高(1株分蘖洋葱根系分泌物对应10mL去离子水)的处理效果更佳。高浓度的分蘖洋葱根系分泌物有利于土壤过氧化氢酶、过氧化物酶、转化酶及脲酶活性的提高。

The effects of root exudates of tillering onion on cucumber(Cucumis sativus L.)soil nutrients and enzyme activities were studied,in which tillering onion cultivars with different allelopathic potentials were taken as donor plant and cucumber was used as accepter plant.Results showed that the root exudates of different tillering onion cultivars improved the contents of available nitrogen,organic matter,available phosphorus and available potassium,suggesting that root exudates of tillering onion increased the content of cucumber soil nutrients.At the concentration of 10 mL deionized water per plant,the root exudate from L06 manifested better effects.The root exudate with higher concentration increased the activities of catalase,peroxidase,invertase and urease.