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- Title
不同林龄刺槐叶片养分重吸收特征 及其对土壤养分有效性的响应.
- Authors
许淼平; 张欣怡; 李文杰; 任成杰; 杨改河; 韩新辉
- Abstract
To reveal nutrient resorption characteristics of Robinia pseudoacacia and their driving factors in hilly and gully regions, we measured the concentration of total nitrogen and total phosphorus in leaves and the concentrations and stoichiometry of organic carbon, total nitrogen, total phosphorus, ammonium, nitrate and available phosphorus in soils of R. pseudoacacia plantations with different stand ages. We analyzed the relationship between leaf nitrogen and phosphorus resorption efficiencies and soil nutrient characteristics. The nutrients in plants and soil changed significantly with stand ages. The total and available phosphorus concentrations were low in the soil. Nitrogen resorption efficiency first increased and then decreased with the increases of stand age, with a range of 48.2%-54.0% and a mean value of 48.5%. Phosphorus resorption efficiency increased significantly with stand age, with a range of 45.2%-49.4% and a mean value of 46.9%. Nitrogen resorption efficiency showed negative response to soil nitrogen and N : P. Phosphorus resorption efficiency was significantly positively correlated to soil N: P and negatively correlated to soil available phosphorus. Our results indicated that soil nutrient availability negatively drove nutrient resorption efficiency. The strategies of leaf nutrient resorption responded strongly to soil N: P due to the N2-fixing effect and P-limitation of R. pseudoacacia.
- Subjects
BLACK locust; PHOSPHORUS in soils; NITROGEN in soils; PLANT nutrients; PLANT-soil relationships
- Publication
Yingyong Shengtai Xuebao, 2020, Vol 31, Issue 10, p3357
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.202010.001