Interactive effects of liming and straw incorporation on yield and nitrogen uptake in a double rice cropping system

LIAO Ping1 LIU Lei1 HE Yu-Xuan1 TANG Gang1 ZHANG Jun2 ZENG Yong-Jun1 WU Zi-Ming1 HUANG Shan1

(1.Ministry of Education and Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University, Nanchang, Jiangxi, China 330045)
(2.Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China 100081)

【Abstract】Soil acidification and low fertility limit the crop productivity in red paddy soils. Liming and straw incorporation are effective practices to alleviate soil acidification and improve soil fertility, respectively, while their interaction is still unclear. A four-year field experiment was conducted in a double rice cropping system with red paddy soil in Jiangxi Province to examine the interactive effect of liming and straw incorporation on rice yield and nitrogen (N) uptake from 2015 to 2018. Either liming or straw incorporation increased the grain yield and N uptake in both early and late rice seasons. Lime application increased the yield and N uptake by 10.7% and 15.5% under straw incorporation, while by 4.4% and 9.7% with straw removal in the early rice season, respectively. Liming enhanced the yield and N uptake by 18.7% and 24.6% in the straw-incorporated treatments in the late rice season, respectively, whereas only by 10.5% and 5.7% in the straw-removed treatments. The increases in grain yield, N uptake, and soil pH by liming for both early and late rice diminished over time. Neither soil organic matter nor total N content was significantly affected by liming after the four-year experiment. Straw incorporation significantly increased the soil organic matters while had no effect on total N. Therefore, limes should be applied along with straw incorporation to simultaneously increase the double rice yield, alleviate the soil acidification, and improve the soil fertility of acidic paddy. Besides, our results suggest that limes should be applied approximately every four years in the double rice cropping system with acidic red soil.

【Keywords】 soil acidification; straw incorporation; liming; double rice; grain yield; nitrogen uptake;


【Funds】 National Natural Science Foundation of China (31701383) National Key Research and Development Program of China (2018YFD0301102)

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This Article



Vol 46, No. 01, Pages 84-92

January 2020


Article Outline


  • 1 Materials and methods
  • 2 Results
  • 3 Discussion
  • 4 Conclusions
  • References