文献类型： 外文期刊

作者： Li, Yinkun ¹ ; Wang, Zhan ¹ ; Guo, Wenzhong ¹ ; Duan, Minjie ³ ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Intelligent Equipment Res Ctr, 11 Shuguang Huayuan Middle Rd, Beijing 100097, Peoples R China

2.Ningxia Acad Agr & Forestry Sci, Guyuan Branch, Guyuan 756000, Peoples R China

3.Beijing Acad Forestry & Landscape Architecture, Beijing Key Lab Ecol Funct Assessment & Regulat T, Beijing Urban Ecosyst Positioning Observat & Res, Beijing 100102, Peoples R China

关键词： Organic production; Chinese flowering Cabbage; Manure nitrogen level; amoA gene; Economic benefits

期刊名称：JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：3.1； 五年影响因子：3.6 ）

ISSN： 0718-9508

年卷期： 2024 年 24 卷 4 期

页码：

收录情况： SCI

摘要： Clarify soil nitrogen (N) nutrient dynamics for organic production to guide manure application in organic monocultures with three crop rotations per annum in northwestern China. Field experiments were conducted to clarify the fate of N-15-labeled manure N in organic vegetable fields, and evaluate the effects of manure N application levels from 0 to 1200 kg N ha(-1) on the yield of organic Chinese flowering cabbage and the economic benefits to producers. Average NO3--N concentrations in the topsoil (0-20 cm depth) increased significantly with manure N level and was positively correlated with abundance of ammonia-oxidizing bacterial (AOB) amoA genes and potential nitrification rates. The NO3--N concentration in the 20-100 cm profile was not significantly changed at manure N levels below 600 kg N ha(-1); however, at 1200 kg N ha(-1), the NO3--N concentration in the profile increased significantly, enhancing the deep leaching of NO3--N. Compared with 600 kg N ha(-1) application, percentage manure N-15 loss increased by 77.3% and 104.5% (P<0.01) following manure applications of 900 and 1200 kg N ha(-1), respectively. The N-15 residual percentage decreased by 28.6% and 31.7% (P<0.01), respectively, and percentage uptake by crops decreased by 26.3% and 71.4% (P<0.01), respectively. The biomass, yield, and economic benefits of Chinese flowering cabbage initially increased, and thereafter decreased with increase in manure N level, peaking at 900 kg N ha(-1). The optimal manure N level of 600-900 kg N ha(-1) is recommended for application in organic cultivation in northwestern China.