%0 Journal Article
%A Chengqing LI
%A Linkui CAO
%A Liushen HU
%A Meifang HOU
%A Shuai XIONG
%A Shuoshuo LIANG
%A Tianyou JIANG
%A Xiyan JI
%A Zhimin SHA
%T Effect of Grass Cultivation on Ammonia Volatility in Peach Orchard Soil
%D 2025
%R 10.7525/j.issn.1673-5102.2025.05.012
%J Bulletin of Botanical Research
%P 783-794
%V 45
%N 5
%X <p>
	In conventional orchard planting practices， soil ammonia volatilization caused by traditional methods has shown a gradually increasing trend over the years. This study employed a portable closed chamber intermittent pumping method to investigate the effects of grass cultivation on soil ammonia volatilization in peach orchards in Shanghai. Focusing on ammonia emission levels under different vegetation cover conditions in Nanhui Peach Orchard of Pudong New District， three treatments were established： white clover cover cultivation（TM）， conventional fertilization（NM）， and a non-fertilized control（CK）. The research revealed that the annual ammonia volatilization and nitrogen loss rate under NM treatment reached 13.08 kg<strong>·</strong>hm<sup>-2</sup> and 1.15%， respectively， showing 2.91% and 4.55% higher values compared to TM treatment. The control group（CK） exhibited an annual ammonia emission of 4.40 kg<strong>·</strong>hm<sup>-2</sup>. No significant difference in ammonia volatilization and nitrogen loss rates was observed between TM and NM treatments. Principal component analysis demonstrated that soil ammonia volatilization in peach orchards was positively correlated with soil ammonium nitrogen（NH4+-N） content and air humidity（RH）， with a particularly strong correlation toNH4+-N reaching statistical significance（<i>P</i>&lt;0.01）. Compared with average ammonia emissions from Chinese orchards and typical orchard ammonia volatilization losses in the middle-lower Yangtze River basin， TM treatment reduced the soil ammonia emissions by 12.95% and 76.89% respectively. This experiment confirmed that white clover cover cultivation served as an effective approach to mitigate soil ammonia volatilization in peach orchards. At the same time， the cultivation has the potential of increasing fruit quality.
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%U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2025.05.012