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[1]ZHANG Cong,MU Ping,SHANG Jianming.Effects of Continuous Returning Corn Straw on Soil Chemical Properties, Enzyme Activities and Yield Trait[J].Research of Soil and Water Conservation,2018,25(01):92-98.

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Effects of Continuous Returning Corn Straw on Soil Chemical Properties, Enzyme Activities and Yield Trait

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 01 Page number: 92-98 Column: Public date: 2018-02-28

Title:: Effects of Continuous Returning Corn Straw on Soil Chemical Properties, Enzyme Activities and Yield Trait

Author(s):: ZHANG Cong^1,2, MU Ping^1,2, SHANG Jianming^1,2; 1. College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China;
2. Gansu Provincial Key Laboratory of Aridland Crop Sciences, Lanzhou 730070, China

Keywords:: corn; straw returned; soil nutrients; soil enzyme activity

CLC:: S157.2;S158.3

DOI:: -

Abstract:: Returning straw into soil is the effective measure to improve the soil properties, improve soil fertility and increase crop yields. This research under the background of corn straw returned for a long time to explore the changes of soil physical and chemical properties, the surface soil enzyme activity change characteristics and the effect of maize yield with increasing years of straw returning. This experiment used corn straw returning field test in Experimental Station in Gansu Province to explore (Y₀, Y₉, Y₁₂, Y₁₅) soil physical and chemical properties and the growth period of maize enzyme activity dynamically and the change of maize yield traits with years of straw returned on the basis of previous research. The results show that straw returning has good modified effects on soil bulk density, soil porosity, soil pH with the extension of years of straw returning; extending the years of straw returning reduced the growth rate of organic carbon, total nitrogen, total phosphorus, available P, alkaline hydrolysis nitrogen, available K in the 0—30 cm soil layer, and the soil organic carbon and soil nutrient reached the balance when the straw returning lasted more than 10 years; soil catalase, urease, alkaline phosphatase and invertase activities showed the rising trend with the extension of the years in the 0—30 cm soil layer in the growth period of maize, and with maize growth period, soil enzyme activities showed dynamic changes. Straw returning can effectively improve the corn grain yield, but not dramatically increased with the extension of years. Therefore, we may be considered to reduce the amount of straw returning appropriately when practice of straw returning lasted more than 10 years so as to more efficiently use the corn straw to improve soil nutrients.

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