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| DOI：10.13522/j.cnki.ggps.2022201 |
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| Short-term Response of Rice Growth, Water and Fertilizer Utilization to Different Fertilizer Applications in Land Consolidation Paddy Fields |
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HUANG Xingcheng, LI Yu, LIU Yanling, ZHANG Yarong,YANG Yehua, ZHU Huaqing, JIANG Taiming
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1.Institute of Soil and Fertilizer, Guizhou Academy of Agricultural Sciences, Guiyang 550006, China; 2. National Agricultural Experimental Station for Soil Quality in Guiyang, Guiyang 550006, China; 3. Scientific Oberving and Experimental Station of Arable Land Conservation and Agricultural Environment (Guizhou), Ministry of Agriculture and Rural Affairs, Guiyang 550006, China;
4. Guizhou Academy of Agricultural Sciences, Guiyang 550006, China
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| Abstract: |
| 【Objective】In order to provide scientific basis for scientific water and fertilizer management of rice, the effects of different fertilization models on rice growth and water and fertilizer utilization were explored. 【Method】Four fertilization treatments were used in pot experiments: balanced chemical fertilizer(CF), low amount organic fertilizer instead of chemical fertilizer (CF-LM), high amount organic fertilizer instead of chemical fertilizer (CF-HM), and no fertilization control (CK). Rice growth, yield and composition factors, water and fertilizer utilization were investigated in four soils from land consolidation paddy fields. 【Result】Compared with the no fertilizer control treatment(CK), the number of tillers, the length, width and area of flag leaf in rice were increased significantly with fertilization treatments(CF, CF-LM and CF-HM). Under the condition of equal nutrient input, the grain yield of rice under CF was significantly higher than that of CF-LM and CF-HM, with an average increase of 39.1% and 175.4%, respectively. The water and fertilizer utilization of each treatment were highest in CF, followed by CF-LM and CF-HM. Pathway analysis showed that the number of panicles, spikelets per panicle, percentage of filled grain, and 1000-grain weight directly and significantly promoted the establishment of rice grain yield, with direct path coefficients were 0.83, 0.23, 0.14 and 0.05, respectively. 【Conclusion】It was concluded that, the short-term application of balanced chemical fertilizer after paddy field consolidation achieved higher grain yield, water and fertilizer utilization efficiency. Chemical fertilizer improving rice grain yield by increasing numbers of tillers and numbers of panicles. |
| Key words: land consolidation paddy fields; fertilization; yield; PFP; WUE |
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