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Chinese Agricultural Science Bulletin ›› 2014, Vol. 30 ›› Issue (6): 198-202.doi: 10.11924/j.issn.1000-6850.2013-1231

Special Issue: 玉米 小麦

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Effects of Tillage Managements in Wheat-maize Whole Season on the Soil Nitrogen and Potassium in Summer Maize

  

  • Received:2013-04-28 Revised:2013-06-17 Online:2014-02-25 Published:2014-02-25

Abstract: In order to explore the most suitable tillage to reach high and stable yield in summer maize in sub-humid and drought areas in Shandong Province, with ten different tillage treatments during wheat-maize whole season, the effects of tillage managements on the soil total nitrogen, available potassium and grain yield in summer maize were studied. Among all tillage managements, the soil total N was the highest at grain filling stage and the lowest at jionting stage, and the available K was the highest at filling stage in maize season. The soil N and K content in each soil layer were significantly different. The soil total N and available K content in the 0-20 cm soil layer was higher than that in the deeper layer (20-40 cm). Conventional tillage management (CK) and A3B3R i.e. subsoiling tillage at wheat season + no-tillage at maize season + straw returning both showed highest total N in the 0-20 cm soil layer, but the total N in the deeper soil layer of CK was the lowest. A4B2R i.e. rotary tillage at wheat season + no-tillage at maize season + straw returning showed highest available K in the 0-40 cm soil. The yield of CK was significantly lower than all other tillage managements, but all other tillage managements had no significant difference.