摘要
通过保护地番茄栽培试验，研究渗灌及不同灌水控制下限10、16、25、40和63kPa处理对0—10、10—20、20—30、30—40和40—60cm 5个土层脲酶和过氧化氢酶活性的影响。结果表明：渗灌及其灌水控制下限能显著影响土壤中脲酶和过氧化氢酶的活性。渗灌灌水能促进脲酶活性的提高，灌水控制下限较高时，灌水处理后各土层脲酶活性较高，有利于为作物的生长提供充足的氮素营养。过氧化氢酶活性的变化与灌水和土壤水分状态密切相关，灌水控制下限较低时，灌水处理后各土层过氧化氢酶活性较高，频繁少量的灌水能促进各土层过氧化氢酶活性的不断提高。
Changes of soil urease and catalase activity were studied in five irrigation treatments, its maximum allowable depletion was 10 kPa, 16 kPa, 25 kPa, 40 kPa and 63 kPa respectively in tomato cultivated in a protected field. The results showed that subsurface irrigation and irrigation scheduling had significant effects on soil urease and catalase activity. Subsurface irrigation could accelerate soil urease activity and it was higher in the treatment of higher maximum allowable depletion, which was beneficial to the supply of sufficient N for plant growth. Changes of catalase activity were closely relevant with soil available water. Catalase activity was higher in the treatment of lower maximum allowable depletion.
出处
《安徽农业科学》
CAS
北大核心
2006年第1期103-105,共3页
Journal of Anhui Agricultural Sciences
基金
国家"863"计划节水专项(2002AA2Z4321)
辽宁省节水重大项目(2001212001)
关键词
渗灌
灌水控制下限
脲酶活性
过氧化氢酶活性
Subsurface irrigation
Irrigation scheduling
Urease activity
Catalase activity
