Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2013, Vol. 29 ›› Issue (6): 154-159.doi: 10.11924/j.issn.1000-6850.2012-0641

Special Issue: 玉米 农业气象

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Effects of Rotational Tillage on Senescence Metabolism of Leaf and Yield in Summer Maize in Rain Fed Regions of Southern Henan

  

  • Received:2012-02-29 Revised:2012-03-27 Online:2013-02-25 Published:2013-02-25

Abstract: The research was conducted on the effect of two single practices, including soil tillage and straw management, on the leaf senescence in the late growth stage of summer maize and grain yield in order to find a suitable integrated system in rain fed area of southern Henan. Eight treatments were from the combination of four-year interval subsoiling, three-year subsoiling followed by no-tillage, three-year no-tillage followed by subsoiling and four-year no-tillage with the straw mulching and clearance for four years. The results showed that, rotational tillage measures of three-year subsoiling followed by no-tillage and three-year no-tillage followed by subsoiling with straw mulching increased chlorophyll content, SOD, POD and CAT activities of ear leaves in the maize, decreased MDA content, and the aging process of maize leaves was slowed down, increased the biomass produced after anthesis, economic coefficient and grain yield. The yield increased by 10.68% with straw mulching treatment compared with no straw mulching; the yield of three-year subsoiling followed by no-tillage was increased by 2.60% compared with four-year subsoiling. Three-year no-tillage followed by subsoiling was increased by 4.21% compared with four-year no-tillage. The yield of three-year subsoiling followed by no-tillage with straw mulching was increased by 23.32% compared with four-year no-tillage with no straw mulching. Multi factor variance analysis showed that straw mulching treatments, tillage methods and their interaction had significant effects on the yield of summer maize.