We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Fertilization Failed to Make Positive Effects on Torreya grandis in Severe N-Deposition Subtropics.
- Authors
Han, Yini; Wang, G. Geoff; Wu, Tonggui; Chen, Wenjing; Ji, Yongliang; Jin, Songheng
- Abstract
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.
- Subjects
ENVIRONMENTAL economics; PLANT variation; PLANT growth; POLLUTION; SUPPLY &; demand; FERTILIZERS
- Publication
Sustainability (2071-1050), 2021, Vol 13, Issue 17, p9736
- ISSN
2071-1050
- Publication type
Article
- DOI
10.3390/su13179736