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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (29): 46-51.doi: 10.11924/j.issn.1000-6850.casb2022-0992

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Effects of Conditioner on Rice Yield and Acid Soil Properties

WANG Ronghui1,2,3(), LI Yumiao4, YAO Jianwu1,2,3, ZENG Ruikun1,2,3, LI Tong1,2,3, TANG Mingdeng1,2,3, NING Jianfeng1,2,3()   

  1. 1 Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs, Guangzhou 510640
    2 Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640
    3 Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640
    4 Agricultural Science and Technology Extension Service Center of Yangshan County, Qingyuan, Guangdong 513100
  • Received:2022-11-24 Revised:2023-02-06 Online:2023-10-15 Published:2023-10-11

Abstract:

To reveal the relationship between the application amounts of soil conditioners from different material sources and the change rules of rice yield, biomass, biological characteristics, nitrogen, phosphorus and potassium contents, and soil nutrients under different dosages, three kinds of acid soil conditioner were prepared with calcium carbide waste slag, mine waste and lime as source materials, and three dosages of low-level (750 kg/hm2), medium-level (1125 kg/hm2) and high-level (1500 kg/hm2) were applied on the day before rice transplanting. Biological characteristics of crop yield, biomass and soil nutrient characteristics were observed during harvest period. The results showed that the effects of conditioners from different raw materials on rice yield increased first and then decreased with the increase of application amount. The yield and leaf length of each treatment showed a trend of increasing first and then decreasing, while the leaf width showed no obvious rule. The pH value of soil showed a trend of increasing generally, and there was no significant difference in the effects on organic matter and total nutrients. The content of available potassium decreased obviously, and the content of available phosphorus decreased significantly at the high dosage of the three conditioners. In general, with calcium carbide waste slag as raw material, the rice yield of medium dosage treatment (T1M) was 8062.5 kg/hm2, 11.2% higher than that of the control, the difference reached a significant level, and the effect was good. Rational application of acid soil conditioner can improve rice yield in acidified soil. Different sources and application dosages have great differences in the effects on rice yield and other physiological indexes. It is suggested that necessary exploration tests should be carried out before large-scale application of acid soil conditioner.

Key words: acid soil, conditioner, yield, biomass