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采用根箱模拟方法,研究3种耕作方式(苗带耕作、行间耕作和全层耕作)和两种耕作深度(10 cm、30 cm)对玉米根系空间分布和保护酶活性的影响。结果表明,耕作方式显著影响玉米根系空间分布状况,深耕可延长行间耕作和全层耕作的根系功能期。根系超氧化物歧化酶(SOD)和过氧化物酶(POD)活性在耕作方式间表现为全层耕作>行间耕作>苗带耕作,深耕可增加玉米生育后期(乳熟期)深层土壤中根系SOD活性。行间耕作和全层深耕均延长玉米深层根系功能期和保护酶活性,实现增产(无显著差异)。因此,从节约成本和提高经济效益考虑,行间深耕是一种更适宜推广的玉米耕作栽培方式。
The effects of three tillage modes (seedling cultivation, intercropping and full-field tillage) and two tillage depths (10 cm and 30 cm) on the spatial distribution of root system and protective enzyme activities were studied by root box simulation. The results showed that the tillage mode significantly affected the spatial distribution of maize root system, and the deep-rooted cultivation could extend the functional period of root system. The activities of superoxide dismutase (SOD) and peroxidase (POD) in root system showed that full-layer tillage> inter-tillage tillage> tillage with tillage and tillage increased maize growth in late stage (milky stage) Root SOD activity. Intercropping and deep plowing both prolonged deep roots functional stage and protective enzyme activity in maize, and increased yield (no significant difference). Therefore, in order to save costs and improve economic efficiency, deep plowing between lines is a more appropriate way to promote corn cultivation.