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[1]LI Huan,WEI Yali,YAN Bangguo,et al.Response of Soil Enzyme Activities and Trifolium repens L. Growth to Nitrogen and Phosphorus Addition in Dry and Hot Valley[J].Research of Soil and Water Conservation,2022,29(04):89-94.

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Response of Soil Enzyme Activities and Trifolium repens L. Growth to Nitrogen and Phosphorus Addition in Dry and Hot Valley

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 04 Page number: 89-94 Column: Public date: 2022-06-20

Title:: Response of Soil Enzyme Activities and Trifolium repens L. Growth to Nitrogen and Phosphorus Addition in Dry and Hot Valley

Author(s):: LI Huan^1,2, WEI Yali¹, YAN Bangguo², SUN Yi², HE Runlian², LI Yilin², FANG Haidong²; (1.College of Resources, Sichuan Agricultural University, Chengdu 611130, China; 2.Institute of Tropical Eco-agriculture, Yunan Academy of Agricultural Sciences, Yuanmou, Yunnan 651300, China)

Keywords:: dry hot valley; land use types; limitation of nitrogen and phosphorus; soil enzyme activities; Trifolium repens L.

CLC:: S154

DOI:: -

Abstract:: This study aims to explore the effects of nitrogen and phosphorus addition on soil enzyme activities and plant growth under different land use types in dry and hot valleys, and the association between soil enzyme activities and plant growth. Soils in 6 different land-use types including shrubs, grasslands, forests, new farming, permanent farming, eroded bare land in Yuanmou dry-hot valley were collected. Pot experiment was used to explore the response characteristics of soil enzyme activities and Trifolium repens L. growth to treatments of nitrogen(N), phosphorus(P), and nitrogen and phosphorus(N+P). The results show that:(1)plant biomass was affected by both land use types and fertilizer treatments as well as their interactions;(2)there were significant differences in plant growth of nutrient addition in land use types except for soils from farmlands(new farming and permanent farming); the plant biomass of P treatment was significantly higher than that of CK; the plant biomass of N+P treatment was significant higher than that of single application of P fertilizer; however, the differences in plant biomass among different treatments for soils from new farming and permanent farmland were not significant;(3)soil enzyme activities were significantly affected by land use types, but there were no significant differences in soil enzyme activities among different nutrient addition treatments; there was no significant correlation between those soil enzyme activities and plant biomass. In conclusion, plant growth was primarily limited by phosphorus on soils in this dry and hot valley. However, soil enzyme activities were not limited by phosphorus or nitrogen, but mainly affected by land use types.

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Last Update: 2022-06-20