Yield, nitrogen use efficiency and balance response to thirty-five years of fertilization in paddy rice-upland wheat cropping system

Cheng Hu, Xiange Xia, Yunfeng Chen, Yan Qiao, Donghai Liu, Jun Fan and Shuanglai Li
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Cheng Hu: Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences; Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Wuhan, P.R. China
Yunfeng Chen: Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences; Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Wuhan, P.R. China
Yan Qiao: Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences; Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Wuhan, P.R. China
Donghai Liu: Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences; Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Wuhan, P.R. China
Jun Fan: Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences; Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Wuhan, P.R. China
Shuanglai Li: Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences; Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Wuhan, P.R. China

Plant, Soil and Environment, 2019, vol. 65, issue 2, 55-62

Abstract: Optimal soil nitrogen management is vital to crop production and environment protection. Little knowledge is available on crop yield, nitrogen uptake, use efficiency and balance in paddy rice-upland wheat cropping system of China. A thirty-five-year long-term field experiment was designed with nine treatments, including an unfertilized treatment (control), nitrogen (N), phosphorus (P), potassium (K) fertilizer, manure (M), and manure combined with mineral fertilizer treatments. Crop yield, N uptake, use efficiency, and N surplus or deficit amount were determined. The results indicated that rice, wheat yield and N uptake amount in the manure combined with mineral fertilizer treatments were higher than that in the manure alone or mineral fertilizer alone treatments. N use efficiency was the highest in the treatment with manure alone. Soil N input indicated a surplus in the mineral fertilizer in combination with manure treatment, but soil N input indicated a deficit in the control, NPK and M treatments. Considering crop yields, N use efficiency and N balance, recommended N application amount is almost 220 kg N/ha/year in the paddy rice-upland wheat cropping system. Taking into account labour and fertilizer sources, half mineral N and half organic N applications were recommended.

Keywords: crop output; fertilizer recovery rate; Oryza sativa L.; Triticum aestivum L.; long-term fertilizer experiment (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:65:y:2019:i:2:id:576-2018-pse

DOI: 10.17221/576/2018-PSE

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