Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (17): 105-111.doi: 10.11924/j.issn.1000-6850.casb2020-0496

Special Issue: 农业工程 水稻

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Effect of Pipe Drainage on Scale Farmland Rice Nutrient Absorption and Yield Composition

Jiang Lingjie1,2(), Dong Linlin1, Fan Peng2, Cao Yifan2, Zhou Zhengping2, Shen Xinping2, Lu Changying1, Shen Mingxing1()   

  1. 1Suzhou City Academy of Agricultural Sciences, Suzhou Jiangsu 215000
    2Agronomy College of Yangzhou University, Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou Jiangsu 225009
  • Received:2020-09-23 Revised:2020-12-20 Online:2021-06-15 Published:2021-06-29
  • Contact: Shen Mingxing E-mail:2030206292@qq.com;smxwwj@163.com

Abstract:

To explore the effect of underground pipe drainage on the absorption of nitrogen, phosphorus and potassium and yield components of rice plants at later stages of growth, ‘Nanjing 46’ was used as the test material, an experiment was conducted in two adjacent field blocks of underground pipe drainage and traditional open ditch drainage in Taicang Donglin Farm of Suzhou City. Rice samples were collected at different locations from the ditch (seedling ditch spacing) and different locations from the pipe (seedling pipe spacing) in the underground pipe drainage field block and the sampling of the traditional open ditch drainage field block was used as a control, to analyze the difference of the nitrogen, phosphorus and potassium content and the yield composition of the rice plants at the jointing booting stage, long earing stage and mature stage. The results showed that: with the increase of the seedling ditch spacing, the absorption of nitrogen, phosphorus and potassium of rice plants had a tendency to decrease, and the area closer to the drainage ditch had the most significant effect. The nitrogen, phosphorus and potassium content and yield of each organ of the rice plant at the seedling pipe spacing of 2.5 m were the highest. Compared with the control group, the absorption of nitrogen, phosphorus and potassium in different organs of rice could have a maximum increase by 25.17%, 80.16%, and 35.19%, respectively. The yield reached 9.97 t/hm2 when the seedling ditch spacing was 15 m and the seedling pipe spacing was 2.5 m, which was 15.22% greater than the control group. The difference in yield was mainly caused by the number of grains per spike, seed setting rate and thousand-grain weight of the rice population. Underground pipe drainage could effectively increase the absorption of nitrogen, phosphorus and potassium in paddy field and increase part yield, but free underground pipe drainage might cause the loss of surface soil nutrients directly above the underground pipes and affect the absorption of nitrogen, phosphorus and potassium in rice plants, and the law of nitrogen, phosphorus and potassium absorption should be further analyzed in the later stage in combination with the relationship between soil leakage intensity or leakage amount and soil nutrient content.

Key words: rice, pipe drainage, seedling pipe spacing, seedling ditch spacing, nutrient absorption, yield omposition

CLC Number: