›› 2018, Vol. 30 ›› Issue (2): 268-274.DOI: 10.3969/j.issn.1004-1524.2018.02.13

• Environmental Science • Previous Articles     Next Articles

Effects of maize straw returning modes on soil fertility and maize yield

SA Rula1, YANG Hengshan1, *, GAO Julin2, FAN Fu1, ZHANG Ruifu1, LIU Jing1, WU Shuai1   

  1. 1. College of Agronomy, Inner Mongolia University for the Nationalities, Inner Mongolia Engineering Research Center of Forage Crop, Tongliao 028000, China;
    2. Agricultural College, Inner Mongolia Agricultural University, Hohhot 010018, China
  • Received:2017-06-29 Online:2018-02-20 Published:2018-02-11

Abstract: In order to explore the suitable mode of maize straw returning in west Liaohe Plain, 4 modes, i.e. deep plowing with straw returning (DR) , rotary tillage with straw returning (RR), applying decomposing agent+deep plowing with straw returning (DR+D) and applying decomposing agent+rotary tillage with straw returning (RR+D) were proposed. By taking rotary tillage without straw returning (CK) as control, effects of 4 modes on soill available nutrients, soil enzyme activity and maize yield were compared in 2016. It was shown that RR+D and RR increased maize yield by 24.56% and 28.00%, respectively, as compared to CK, yet there was no significant difference within the yield of DR, DR+D and CK. RR+D significantly (P<0.05) increased the alkaline nitrogen content in 0-10 cm soil layer by 94.56% than CK, while the other treatments showed no significant difference in soil available nutrients contents. All 4 maize straw returning modes could increase soil enzymes activities in different soil depth by varied degrees. On the whole, applying decomposing agent+rotary tillage with straw returning was the optimum mode in the study area.

Key words: straw returning, decomposing agent, yield, soil available nutrient, soil enzyme activity

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