Journal of Northern Agriculture ›› 2022, Vol. 50 ›› Issue (2): 9-17.doi: 10.12190/j.issn.2096-1197.2022.02.02

• Corp cultivation·Germplasm resources • Previous Articles     Next Articles

Effects of different straw returning methods on soil structure and water physical characteristics in the irrigation area of Tumechuan plain

ZHANG Qingwang1, SUN Jiyin1, GAO Julin1, LIU Jian2, ZHANG Yuezhong3, YU Xiaofang1, WANG Zhigang1, HU Shuping2, BAO Haizhu1, HUANG Zhiyuan4   

  1. 1. Key Laboratory of Crop Cultivation and Genetic Improvement,Inner Mongolia Agricultural University,Hohhot 010019,China;
    2. Vocational and Technical College,Inner Mongolia Agricultural University,Salaqi 014109,China;
    3. Jalaid Banner Agricultural Technology Extension Center,Yindeer 137600,China;
    4. Inner Mongolia State-owned Bayan Farm,Bayan Farm 162890,China
  • Received:2022-02-25 Online:2022-04-20 Published:2022-06-20

Abstract: 【Objective】Analyze the impact of various maize straw returning modes on soil physical characteristics,and determine the best method for returning maize straw to the field.【Methods】In a single factor random block design maize variety Xianyu 335 was used to set up five different straw returning modes:conventional farming(CK),deep ploughing straw returning(DPR),subsoiling straw returning(SSR),straw mulching no tillage(NTR),and straw mulching strip deep rotation(SCR). The effects of the different methods on soil physical characteristics and yield were investigated.【Results】From 2019 to 2021,compare with the CK,the soil bulk density of DPR and SSR treatments decreased by 4.9%-8.5%. The soil porosity increased by 2.9-5.2 percentage points. The content of water stable aggregates over 0.25 mm in soil increased by 18.1-19.2 percentage points. The soil structure was improved. The field water capacity increased by 2.6-5.6 percentage points. The water infiltration resistance decreased,and the cumulative infiltration increased. The soil water content improved during the maize peak water demand period and yield increased. The average yield for DPR and SSR treatment was 12.6 and 12.3 t/hm2 in three years. Increased by 19.7% and 17.5% compared with CK.【Conclusion】Deep ploughing and subsoiling straw returning effectively improved soil physical characteristics,increased soil water storage capacity and boosted maize yield.

Key words: Maize, Straw returning, Soil physical characteristics, Soil water content, Yield

CLC Number: 

  • S141.4