Chinese Journal of Plant Ecology >
Effects of different management methods on carbon, nitrogen, and phosphorus contents and their stoichiometric ratios in tea plants
Received date: 2021-03-04
Accepted date: 2021-05-19
Online published: 2021-06-28
Supported by
National Natural Science Foundation of China(41571287)
Aims The content of carbon (C), nitrogen (N) and phosphorus (P) in different plant organs and their stoichiometric characteristics can reflect the nutrient allocation and balance within the plant. In this paper, the response of C, N and P in different organs of tea plants to three management modes was investigated by field experiment. The purpose was to explore the variation characteristics of C, N and P contents and their stoichiometric ratios in roots, stems and leaves of tea plant and its allometric growth relationship under different management modes.
Methods We set up three different management modes in Tieguanyin tea plantations in Anxi, Fujian: routine management mode (M1), intercropping mode (M2) and modern technology mode (M3). In this paper, we investigated C, N, and P contents in the roots, stems, and leaves and their stoichiometric characteristics, nutrient variations and the allometric relationships of tea plants under different management modes.
Important findings The results showed that the N and P contents in roots, stems and leaves of tea plants under M2 and M3 management mode were significantly higher than those under M1 management mode, but no significant differences were observed for the C contents; the order of C:N, C:P and N:P ratios in roots, stems and leaves of tea plants was M1 > M2 > M3. The contents of C, N, and P varied significantly among different organs of tea plants. According to the analysis of variation sources, the management mode factors showed significant impacts on the content variation of all the three elements. The allometric relationships of N and P in roots, stems and leaves (N-P1.7456, p< 0.01; N-P1.0987, p< 0.01; N-P1.1993, p< 0.01) suggested that the nutrient requirements of different organs were similar. Soil pH and bulk density were important factors affecting C:N, C:P and N:P, while soil water content and salinity had great impacts on C content in roots and leaves of tea plants. In general, intercropping, as well as modern drip irrigation and fertilizer management technology, can improve the nutrient absorption efficiency of tea plants, and have positive effects on solving the problem of soil nutrient imbalance.
YIN Xiao-Lei, LIU Xu-Yang, JIN Qiang, LI Xian-De, LIN Shao-Ying, YANG Xiang, WANG Wei-Qi, ZHANG Yong-Xun . Effects of different management methods on carbon, nitrogen, and phosphorus contents and their stoichiometric ratios in tea plants[J]. Chinese Journal of Plant Ecology, 2021 , 45(7) : 749 -759 . DOI: 10.17521/cjpe.2021.0071
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