›› 2017, Vol. 29 ›› Issue (4): 521-527.DOI: 10.3969/j.issn.1004-1524.2017.04.01

• Crop Science •     Next Articles

Effects of returning amount and manner of wheat straw on maize growth in lime concretion black soil field

GUO Jing1, ZHOU Kejin2, *, LIU Fang1, CHEN Lin1, ZHA Daogui1   

  1. 1. Agronomy Department, Suzhou Vocational Technique College, Suzhou 234101, China;
    2. College of Agriculture, Anhui Agricultural University, Hefei 230036, China
  • Received:2016-12-12 Online:2017-04-20 Published:2017-04-27

Abstract: To explore the suitable straw returning amount and manner in lime concretion black soil field, the experiment including 9 treatments with different level combinations of 2 test factors was performed on growth of maize cultivar Zhengdan 958. The indexes determined included plant height, ratio of dry weight to length of 4th internode, photosynthesis indexes, root number and weight, ear characters and yield. It was shown that the treatment of 2/3 straw amount returning with deep ploughing up led to the best straw returning effect and the highest yield, of which all indexes were higher or significantly (P<0.05) higher than those of other treatments. The treatment of 2/3 straw amount returning with shallow rotary tillage was next in rank. While the treatment of whole quantity returning with directly covering revealed the worst performance and the lowest yield. The variance analysis of each index indicated that 2/3 straw amount returning was significantly (P<0.01) better than 1/2 straw amount and the whole quantity, and the whole quantity was the worst straw returning amount. Deep ploughing showed significantly (P<0.01) better effect on maize growth than that of the shallow rotary tillage and directly covering after crushing, and directly covering performed the worst. So, 2/3 straw amount returning with deep ploughing up should be extensively promoted in lime concretion black soil field.

Key words: wheat straw, straw returning amount, straw returning manner, lime concretion black soil field, maize

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