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Bio-Design and Manufacturing  2019 Vol.2 No.2 P.196~203

10.1631/jzus.2001.0196


A NEW APPROACH TO INCREASE THE ATTAINABLE RICE YIELD IN INTENSIVE IRRIGATED RICE SYSTEMS OF ZHEJIANG PROVINCE, CHINA


Author(s):  WANG Guang-huo, Dobermann, A., Witt, C., FU Rong-xing, SUN Qing-zu

Affiliation(s):  Dept. of Natural Resources, Zhejiang University, Hangzhou 310029, China; more

Corresponding email(s):   ghwang@mail.hz.zj.cn

Key Words:  rice, yield potential, nutrient efficiency, site-specific nutrient management


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WANG Guang-huo, Dobermann, A., Witt, C., FU Rong-xing, SUN Qing-zu. A NEW APPROACH TO INCREASE THE ATTAINABLE RICE YIELD IN INTENSIVE IRRIGATED RICE SYSTEMS OF ZHEJIANG PROVINCE, CHINA[J]. Journal of Zhejiang University Science D, 2019, 2(2): 196~203.

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Abstract: 
A new site-specific nutrient management approach was developed to break the apparent attainable yield barrier of 6 t·ha-1 in the double rice cropping system of Zhejiang. On-farm experiments involving 21 rice-growing farmer families and NPK long-term experiments commenced in 1997 in the central part of Zhejiang Province to assess the status of soil fertility and productivity under intensive rice-rice cropping. A new site-specific nutrient management (SSNM) approach has been developed for this studied area. Field-specific fertilizer recommendations are calculated considering indigenous nutrient supply, reasonable grain yield targets and corresponding nutrient demand, nutrient balance and nutrient use efficiency, as well as socio-economic factors. The agronomic performance of SSNM was tested against the farmer's fertilizer practice (FFP) in four 1998-1999 cropping seasons. Across seasons and years, SSNM consistently increased plant nutrient uptake, grain yield and profit by about 10%-15% compared to the FFP. Yield levels of 7.5 t·ha-1 or more seem achievable and sustainable through introduction of SSNM and improved extension services in Zhejiang Province.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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