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[1]ZHAO Jixia,YU Yantong,ZHOU Yun,et al.Effect of Organic Manure Replacing Chemical Nitrogenous Fertilizer on Main Yield and Nitrogen Uptake and Utilization Efficiency[J].Research of Soil and Water Conservation,2022,29(05):374-381.

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Effect of Organic Manure Replacing Chemical Nitrogenous Fertilizer on Main Yield and Nitrogen Uptake and Utilization Efficiency

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 05 Page number: 374-381 Column: Public date: 2022-08-20

Title:: Effect of Organic Manure Replacing Chemical Nitrogenous Fertilizer on Main Yield and Nitrogen Uptake and Utilization Efficiency

Author(s):: ZHAO Jixia¹, YU Yantong¹, ZHOU Yun², LI Yongmei¹, FAN Maopan¹; (1.College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China; 2.Tea and Characteristic Biological Industry Development Center of Simao District, Puer, Yunnan 665000, China)

Keywords:: organic manure replacing chemical fertilizer; maize yield and biomass; nitrogen accumulation; N efficiency

CLC:: S143.1; S513

DOI:: -

Abstract:: Replacing certain amount of chemical nutrients with organic manure is an important way to achieve stable and increase crop yield accompanying with zero-increase of fertilizer in China. We studied the effects of organic fertilizer replacing chemical fertilizer with equal nitrogen on maize productivity and nitrogen uptake and utilization efficiency, in order to provide scientific evidence about rational utilization organic resources and adjust maize fertilization pattern in slope cultivated land of red soil in Yunnan. Field plot experiments were conducted, and six treatments with no fertilization control(CK), 100% chemical fertilizer(NPK), and 10%(T₁), 20%(T₂), 30%(T₃), 40%(T₄)ratio of organic fertilizer replacing chemical fertilizer were used to analyze the changes of maize yield, nitrogen uptake and nitrogen use efficiency under different fertilization treatments. According to findings, compared with NPK treatment, the treatment of chemical fertilizers replaced by organic fertilizer at different proportions helps increase corn kernel, straw biomass and corn kernel yield by 6.07%～19.53%, and straw biomass by 2.16%～21.76%. In addition, when 30% of chemical fertilizer is replaced with organic fertilizer, increases of corn kernel yield and straw biomass are the highest, reaching up to 7 653 kg/hm² and 16 530 kg/hm², respectively, which is more significant than other fertilization treatments. The treatments(replacing chemical fertilizers with organic fertilizers)all improve corn kernels and nitrogen uptake of straws. Under different treatments, average accumulation of aboveground nitrogen decreased in the order: T₃(292 kg/hm²)>T₂(248 kg/hm²)>T₁(212 kg/hm²)>T₄(203 kg/hm²)>NPK(176 kg/hm²)>CK(52 kg/hm²). In particular, compared with NPK, T₁, T₂, and T₄ treatments, nitrogen uptake in upper part of corn field under T₃ treatment is increased by 39.90%, 27.37%, 15.01%, and 30.38%, respectively. Compared with NPK treatment, the treatment of replacing fertilizer with organic fertilizer raises nitrogen partial productivities(PFP_N), nitrogen contribution rate(FCR_N), nitrogen apparent recovery efficiency(RE_N), nitrogen agronomic efficiency(AE_N)by 5%～21.80%, 2.44%～9.48%, 20.48%～94.02%, 7.54%～32.86%, respectively. However, under T₃ treatment, the nitrogen use efficiency indexes are dramatically higher than other fertilization treatments. In summary, it is able to increase corn kernel yield and biological yield of corn through combined application of organic fertilizer and chemical fertilizer, so are nitrogen uptake and nitrogen utilization efficiency of corn. The effect is the best under combined application of replacing 30% basal fertilizer with organic fertilizer and other nitrogen. Therefore, this treatment can be adopted as a reasonable fertilization model for increasing maize yield and nitrogen fertilizer efficiency in red-soil slope arable lands in Yunnan.

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Last Update: 2022-08-20