土壤压实节水对水稻生长及土壤生态的影响

Effect of Soil-compacting and Water-saving Irrigation on Rice Growth and Soil Biological Activities

2006年,在沿江地区进行了水稻土壤压实节水试验。结果表明:在高渗透沙壤土地区,实施压实节水灌溉技术,节约灌溉用水24.1%,增产10.1%;实施该技术,对水稻不同生育期土壤真菌、细菌和放线菌的数量没有显著影响;采用压实节水的耕作层土壤,其脲酶活性在水稻拔节期均高于对照;在水稻抽穗期,根系氧化力显著提高。

In 2006 in the areas along the Yangtze River soil-compacting and water-saving intermediate tests were carfled on in the rice fields. The results showed that in the sand soil and the high penetration areas, by application of the water-saving irrigation technique, irrigation water was saved 24. 1% , and the yield increased 10. 1%. At the same time utilization of the technique had no significant impact on the number of fungi, bacteria and actinomyces in the rice root soil at different growth stages. After using the irrigation technique, urease activity in the dense layer of soil at rice jointing stage was higher than the control, and at heading stage the a-NA oxidation of rice root system was significantly improved.