Research Papers

Effects of Machine-transplanting Synchronized with One-time Precision Fertilization on Nutrient Uptake and Use Efficiency of Double Cropping Rice

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  • 1College of Resource 8L Environment, Hunan Agricultural University, Changsha 410128, China
    2Hunan Provincial Agricultural Committee, Changsha 410005, China
    3Miluo Agricultural Bureau, Miluo 414400, China
    4Hunan Dragon Boat Agricultural Machinery Co. Ltd., Miluo 414400, China
    5Hunan Jinyezhongwang Technology Co. Ltd., Yueyang 414300, China
    6Soil and Fertilizer Institute of Hunan Province, Changsha 410125, China
*Corresponding author, E-mail: 314967900@qq.com; Zhouxuan_123@126.com

Received date: 2018-07-16

  Revised date: 2019-07-09

  Online published: 2019-09-10

Abstract

【Objective】 Our aim is to ensure the precision in rice fertilization, and to reveal the nutrient utilization characteristics of machine-transplanted rice under one-time, one-side deep fertilization with reduced nitrogen (N) application level and to improve the nitrogen utilization efficiency for double-cropping rice. 【Method】Field experiments (2017-2018) were conducted using soil-tested formulated fertilization with precise fertilizer distributor to study the effects of one-time precision fertilization on nutrient absorption and utilization of double-cropping rice system in typical growing regions, and to investigate the relationships between nutrient contents and yield.【Result】As compared with conventional fertilization treatment, the accumulations of N, P, K in machine-transplanted early rice under one-time N application rate (reduced by 10%-30%) increased by 7.9%-11.7%, 9.4%-25.9% and 2.0%-6.5% in 2017, 8.2%-15.0%, 6.9%-14.1% and 13.9%-16.7% in 2018, in late rice by -0.6%-5.7%, 9.1%-14.4% and 3.7%-19.6% in 2017, 6.1%-8.5%, 9.4%-19.3% and 18.7%-22.2% in 2018, and N recovery efficiency (NRE), N agronomic efficiency (NAE) and N partial factor productivity (NPFP) in early rice by 38.6%-92.7%, 49.9%-103.6% and 29.49%-103.6% in 2017, 36.9%-85.1%, 46.0%-98.4% and 20.7%-75.4% in 2018, and NRE, NAE, NPFP in late rice by 20.8%-43.1%, 31.3%-64.2% and 18.3%-48.5% in 2017, 26.8%-99.1%, 60.0%-82.9% and 26.6%-60.5% in 2018. The optimum treatment was obtained with a reduction of 20%-30% in N application rate.With the reduction of N application rate, NRE of double-cropping rice first increased then reduced, while NHI, NAE and NPFP were on the rise, and soil alkali-hydrolyzale N declined. 【Conclusion】The integration and optimization of fertilization technology and machine-transplanted technique can effectively reduce N application rate, facilitating N, P, K accumulation and utilization, which is conducive to raise grain yield and N use efficiency of double-cropping rice.

Cite this article

Xuemei ZHONG, Tieping HUANG, Jianwei PENG, Wenlu LU, Xingrong KANG, Mengfei SUN, Siming SONG, Qiyuan TANG, Yuxin CHEN, Dongzhi ZHAN, Xuan ZHOU . Effects of Machine-transplanting Synchronized with One-time Precision Fertilization on Nutrient Uptake and Use Efficiency of Double Cropping Rice[J]. Chinese Journal OF Rice Science, 2019 , 33(5) : 436 -446 . DOI: 10.16819/j.1001-7216.2019.8084

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