Impact of Sheep Manure Replacing Chemical Fertilizer at Equal Nitrogen Rate on Yield and Quality of Zucchini

doi:10.11924/j.issn.1000-6850.casb2025-0286

Abstract

Abstract:

A field experiment was conducted in Songming County, Kunming City, Yunnan Province, and the effects of partially replacing chemical fertilizer with sheep manure on fruit yield, quality, and morphology were investigated using the zucchini cultivar ‘Shilong Feicui’ as the material. Six treatments were established, including 100% chemical fertilizer (CK) and five combinations (FM₁ to FM₅) of chemical fertilizer with different proportions of sheep manure on an equal nitrogen basis. The results demonstrated that substituting chemical fertilizer with sheep manure increased zucchini yield across all combined treatments. The highest yield increase (9.87%) was observed under the FM₃ treatment, which 30% of the chemical fertilizer was replaced by sheep manure, compared to the CK. Regarding fruit morphology, FM₃ significantly increased both fruit length (by 6.41%) and diameter (by 10.22%) compared to CK. The incorporation of sheep manure also improved nutritional quality, reduced crude fiber content while increasing vitamin C and soluble sugar contents. Furthermore, potassium content in the fruit was significantly enhanced, and nitrate content decreased with sheep manure substitution. This study indicates that the rational combined application of sheep manure and chemical fertilizer can effectively enhance zucchini yield and fruit quality, while reducing the accumulation of harmful substances.

Key words: Yunnan red soil, equal nitrogen replacement, chemical fertilizer reduction, zucchini, sheep manure, yield, quality

LIU Xiaoyang, YIN Mei, FU Libo, WANG Wei, WANG Zhiyuan, CHEN Hua, YANG Yanxian, ZHANG Qing, YANG Jida, WANG Yingxue, CHEN Jianfeng. Impact of Sheep Manure Replacing Chemical Fertilizer at Equal Nitrogen Rate on Yield and Quality of Zucchini[J]. Chinese Agricultural Science Bulletin, 2025, 41(32): 23-29.

Figures/Tables 7

References 38

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指标	测定方法
粗纤维	水果、蔬菜粗纤维的测定方法(GB 5009.88—2023)
维生素C	食品安全国家标准食品中抗坏血酸的测定 (GB 5009.86—2016)
可溶性糖	蔬菜及其制品中可溶性糖的测定(NY/T 1278—2007)
氮	植物中氮、磷、钾的测定(NY/T 2017—2011)
磷	植物中氮、磷、钾的测定(NY/T 2017—2011)
钾	植物中氮、磷、钾的测定(NY/T 2017—2011)
硝酸盐含量	食品中亚硝酸盐与硝酸盐的测定(GB 5009.33—2016)

指标	测定方法
粗纤维	水果、蔬菜粗纤维的测定方法(GB 5009.88—2023)
维生素C	食品安全国家标准食品中抗坏血酸的测定 (GB 5009.86—2016)
可溶性糖	蔬菜及其制品中可溶性糖的测定(NY/T 1278—2007)
氮	植物中氮、磷、钾的测定(NY/T 2017—2011)
磷	植物中氮、磷、钾的测定(NY/T 2017—2011)
钾	植物中氮、磷、钾的测定(NY/T 2017—2011)
硝酸盐含量	食品中亚硝酸盐与硝酸盐的测定(GB 5009.33—2016)