文献类型：期刊文献

英文题名：Fertilization Failed to Make Positive Effects on Torreya grandis in Severe N-Deposition Subtropics

作者：Han, Yini[1,2] Wang, G. Geoff[3] Wu, Tonggui[4] Chen, Wenjing[1,2] Ji, Yongliang[1] Jin, Songheng[1,2]

第一作者：Han, Yini

通信作者：Jin, SH[1];Jin, SH[2]

机构：[1]Zhejiang A&F Univ, Jiyang Coll, Zhuji 311800, Peoples R China;[2]Zhejiang A&F Univ, Sch Forestry & Biotechnol, State Key Lab Subtrop Silviculture, Hangzhou 311300, Peoples R China;[3]Clemson Univ, Dept Forestry & Environm Conservat, Clemson, SC 29634 USA;[4]Chinese Acad Forestry, Res Inst Subtrop Forestry, East China Coastal Forest Ecosyst Long Term Res S, Hangzhou 311400, Peoples R China

年份：2021

卷号：13

期号：17

外文期刊名：SUSTAINABILITY

收录：;WOS:【SSCI(收录号:WOS:000694531300001)，SCI-EXPANDED(收录号:WOS:000694531300001)】；

基金：The National Key Research and Development Program of China (2019YFE0118900), the National Natural Science Foundation of China (31971641), Jiyang College of Zhejiang A&F University under Grant (0525170003), and the Young People Fund of Natural Science Foundation of Zhejiang province, China (LQ19C160011).

语种：英文

外文关键词：Torreya grandis; nitrogen enrichment; long-term fertilizer treatments; phosphorus limitation

摘要：In managed orchards, fertilization brings out not only high productivity expectations but also severe environmental pollution. Because economic profit takes priority over environmental cost, increasing amounts of fertilizer have been used in mature subtropical Torreya grandis orchards. However, given the magnitude of global nitrogen deposition, it's worth considering whether heavy fertilizer treatment is necessary. To elucidate the balance between T. grandis nutrient demands and fertilizer supply, we determined the C, N, and P concentrations of foliar and soil ([C], [N], [P]) at 9 orchards undergoing long-term fertilizer treatments in two scenarios of N and N + P addition with different intensity. After documenting the dynamic variation of plant growth, nutrients characteristic, and the corresponding resorption efficiency, we found that excessive N addition interfered T. grandis' sensibility to P availability in this N-enrichment area, leading to an increasing foliar [P] and resorption efficiency (PRE) and decoupling plant C:N:P ratios. As a result, enhanced fertilizer supply failed to improve carbon accumulation, plant growth, and yield effectively. These results demonstrate that extra fertilization in the N-saturated study area highly reduced the economic and ecological efficiency of fertilizers. Thus, our research suggests that N addition in the studied orchards should be rejected, and we recommend organic management as a more conducive method to achieve sustainable development.