Research on World Agricultural Economy

Effects of Mixed Sowing of Chinese Milk Vetch (Astragalus sinicus L.) and Rape on Rice Yield and Soil Physical and Chemical Properties

Qiliang Hu

Research Center on Ecological Sciences, Jiangxi Agricultural University, Nanchang, Jiangxi, 330045, China

Binjuan Yang

Research Center on Ecological Sciences, Jiangxi Agricultural University, Nanchang, Jiangxi, 330045, China

Na Li

Research Center on Ecological Sciences, Jiangxi Agricultural University, Nanchang, Jiangxi, 330045, China

Ning Liu

Research Center on Ecological Sciences, Jiangxi Agricultural University, Nanchang, Jiangxi, 330045, China

Shujiang Guo

Research Center on Ecological Sciences, Jiangxi Agricultural University, Nanchang, Jiangxi, 330045, China

Guoqin Huang

Research Center on Ecological Sciences, Jiangxi Agricultural University, Nanchang, Jiangxi, 330045, China

DOI: https://doi.org/10.36956/rwae.v3i1.483

Received: 12 January 2022; Received in revised form: 15 February 2022; Accepted: 18 February 2022; Published: 4 March 2022

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Abstract

In order to explore the effects of Chinese milk vetch and rape mixed sowing on rice yield and soil fertility, and select the best planting mode, five different ratios of Chinese milk vetch and rape mixed sowing were designed to study the effects of different ratios on rice yield, soil physicochemical properties and soil fertility in 0-10 cm, 10- 20 cm and 20-30 cm layers. Grey correlation analysis of soil nutrients and yield was carried out by using the grey system theory. The influence of different soil layers on soil chemical properties was greater than physical properties. The effect on shallow soil is greater than that on deep soil. Mixed sowing of Chinese milk vetch and rape improved soil comprehensive fertility in all soil layers, and rice yield was the highest in the 2M2R treatment. pH value had the greatest effect on actual rice yield, followed by available potassium. Therefore, mixed sowing of Chinese milk vetch and rape could significantly increase the yield of early rice and soil nutrient content, and the pattern of “1/2 Chinese milk vetch +1/2 rape-early rice-late rice” had the best effect.

Keywords: Mixed sowing of Chinese milk vetch and rape; Rice yield; Comprehensive fertility; Grey correlation method

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