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针对辽宁省中北部地区土壤耕层变浅、犁地层变硬等问题,以当地传统的耕作方式秋季旋耕为对照,设置秋季旋耕后翻耕25 cm、秋季旋耕后深松30 cm、秋季旋耕后隔年深松30 cm 3种耕作方式,探讨不同耕作方式对土壤水分和玉米生长发育的影响。结果表明,翻耕或深松处理均有利于土壤含水量的提高,其中以秋季旋耕后深松30 cm和秋季旋耕后翻耕25 cm的保墒效果最佳;翻耕或深松处理均增加了根冠比和产量,提高了玉米叶片酶活性,延缓了玉米生育后期叶片的衰老,其中以秋季旋耕后翻耕25 cm效果最佳。秋季旋耕后翻耕25 cm的耕作方式较好。
Aiming at the problems of shallow soil layer and hardened plow layer in central and northern part of Liaoning Province, using the traditional rotary tillage method in autumn in the country as control, In the autumn after the rotary plowing year after year 30 cm 3 kinds of tillage practices to discuss the different tillage on soil moisture and corn growth and development. The results showed that both tillage and subsoiling treatments were conducive to the improvement of soil moisture content, of which the effect of soil moisture conservation was the best when the depth was 30 cm in autumn and 25 cm in tilling in autumn; Increased root / shoot ratio and yield, increased maize leaf enzyme activity, postponed leaf senescence in later growth stage of maize, of which 25 cm tilling was the best after rotary tilling in autumn. Tilling 25 cm after tillage in autumn farming method is better.