Effects of Litter Addition on Soil Enzyme Activitie and Stoichiometric Ratio in Sagebrush Desert Grassland

doi:10.11733/j.issn.1007-0435.2026.02.026

Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (2): 643-652.DOI: 10.11733/j.issn.1007-0435.2026.02.026

Effects of Litter Addition on Soil Enzyme Activitie and Stoichiometric Ratio in Sagebrush Desert Grassland

MA Peng¹, ZHOU Lei¹, SUN Zong-jiu^1,2,3, Asitaiken·Julihaiti¹, WEI Peng⁴

1. College of Grassland Science, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China;
2. Xinjiang Key Laboratory of Grassland Resources and Ecology, Urumqi, Xinjiang 830052, China;
3. Key Laboratory of Grassland Resources and Ecology of Western Arid Region, Ministry of Education, Urumqi, Xinjiang 830052, China;
4. Xinjiang Uygyr Automomous Region Academy of Animal Science, Urumqi, Xinjiang 830052, China

Received:2025-04-03 Revised:2025-05-20 Published:2026-01-22

凋落物添加对蒿类荒漠草地土壤酶活性及其化学计量比的影响

马鹏¹, 周磊¹, 孙宗玖^1,2,3, 阿斯太肯·居力海提¹, 魏鹏⁴

1. 新疆农业大学草业学院, 新疆乌鲁木齐 830052;
2. 新疆草地资源与生态自治区重点实验室, 新疆乌鲁木齐 830052;
3. 西部干旱区草地资源与生态教育部重点实验室, 新疆乌鲁木齐 830052;
4. 新疆维吾尔自治区畜牧科学院, 新疆乌鲁木齐 830052

通讯作者: 孙宗玖，E-mail:nmszj@21cn.com
作者简介:马鹏（1998-），男，回族，甘肃平凉人，硕士研究生，主要从事草地资源与生态方面的研究，E-mail:2864347311@qq.com；
基金资助:
国家自然科学基金项目（32060408）；新疆维吾尔自治区重点实验室开放课题（2022D04003）；新疆维吾尔自治区高校基本科研业务费（XJEDU2022J006）；新疆维吾尔自治区自然科学基金（2024D01A41）资助

Abstract

Abstract: This study investigated the effects of different addition levels （0， 2.5， 5.0， 7.5 g） of Seriphidium transiliense leaf litter on the enzyme activities and stoichiometric ratios of β-1，4-glucosidase （βG）， N-acetyl-β-glucosaminidase （NAG）， leucine aminopeptidase （LAP）， and alkaline phosphatase （AP） in 100.0 g of soil from Sagebrush desert grassland during 320 d （T₁）， 410 d （T₂）， and 500 d （T₃） of decomposition using an outdoor Mason jar incubation method. The results showed that enzyme activities generally decreased over the decomposition period. Specifically， the βG activity in the 5.0 g treatment at T₂ was significantly higher than that at T₁ and T₃ by 12.16% and 20.53%， respectively （P<0.05）. The NAG activity in the 7.5 g treatment at T₁ was significantly higher than that at T₂ and T₃ by 19.19% and 19.10%， respectively （P<0.05）. Enzyme activities initially decreased and then increased with increasing litter addition. At T₃， the 7.5 g treatment significantly enhanced NAG activity while reducing LAP activity （P<0.05）. The average soil enzyme stoichiometric ratios of C∶N， C∶P， and N∶P were 0.65， 0.91， and 1.41， respectively， with a C∶N∶P stoichiometric ratio of 1∶1.26∶1.05， with the vector angles less than 45°. In conclusion， soil enzyme activities and their stoichiometric ratios were co-regulated by both litter addition amount and decomposition stage， and were constrained by soil nitrogen limitation.

Key words: Litter, Sagebrush desert grassland, Stoichiometric ratio, Soil enzyme activitie

摘要： 本研究以伊犁绢蒿（Seriphidium transiliense）叶凋落物和蒿类荒漠土壤为对象，采用梅森瓶室外培养法，探讨叶凋落物不同添加量（0，2.5，5.0，7.5 g）分解320 d（T₁）、410 d（T₂）、500 d（T₃）对100.0 g土壤β-1，4-葡萄糖苷酶（β-1，4-glucosidase，βG）、N乙酰-β-氨基葡萄糖苷酶（N acetyl-β-glucosamine enzymes，NAG）、亮氨酸氨基肽酶（Leucine aminopeptidase，LAP）、碱性磷酸酶（Alkaline phosphatase，AP）活性及其化学计量比的影响。结果表明：酶活性总体随凋落物分解时间的推移递减，其中5.0 g处理在T₂阶段βG活性显著高于T₁、T₃阶段12.16%，20.53%（P<0.05），7.5 g处理在T₁阶段NAG活性显著高于T₂、T₃阶段19.19%，19.10%（P<0.05）；酶活性随添加量增加呈先降后升趋势，T₃阶段7.5 g处理显著增加NAG活性并降低LAP活性（P<0.05）；土壤酶C∶N、C∶P、N∶P平均值分别为0.65，0.91，1.41，C∶N∶P化学计量比为1∶1.26∶1.05，矢量角度均小于45°。综上，土壤酶活性及其化学计量比受凋落物添加量与分解阶段共同调控，且受土壤氮限制。

关键词: 凋落物, 蒿类荒漠草地, 化学计量比, 土壤酶活性

MA Peng, ZHOU Lei, SUN Zong-jiu, Asitaiken·Julihaiti, WEI Peng. Effects of Litter Addition on Soil Enzyme Activitie and Stoichiometric Ratio in Sagebrush Desert Grassland[J]. Acta Agrestia Sinica, 2026, 34(2): 643-652.

马鹏, 周磊, 孙宗玖, 阿斯太肯·居力海提, 魏鹏. 凋落物添加对蒿类荒漠草地土壤酶活性及其化学计量比的影响[J]. 草地学报, 2026, 34(2): 643-652.

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Effects of Litter Addition on Soil Enzyme Activitie and Stoichiometric Ratio in Sagebrush Desert Grassland

凋落物添加对蒿类荒漠草地土壤酶活性及其化学计量比的影响

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