|Table of Contents|

Litterfall and its nutrient content in Santalum album-Dalbergia odorifera mixed plantation under different management regimes(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2021 05
Page:
1186-1193
Research Field:
Articles
Publishing date:

Info

Title:
Litterfall and its nutrient content in Santalum album-Dalbergia odorifera mixed plantation under different management regimes
Author(s):
XUE Shiyu LI Xiaofei GUO Junyu XU Daping CUI Zhiyi & YANG Zengjiang?
Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China
Keywords:
Santalum album-Dalbergiaodorifera mixed plantation weeding fertilization litterfall amount litterfall composition litterfall nutrient return
CLC:
-
PACS:
DOI:
10.19675/j.cnki.1006-687x.2020.04012
DocumentCode:

Abstract:
In recent years, large-scale plantations of high-value tree species have been widely cultivated, and a typical mixed plantation of Santalum album-Dalbergia odorifera has been successfully established in southern China. In order to assess the effects of different management measures on the litterfall biomass and nutrient cycle of the mixed plantation, we conducted a field tending experiment with four treatments (control, fertilization, weeding, and fertilization + weeding) in an 8-year-old mixed plantation of Santalum album-Dalbergia odorifera in Gaoming county, Guangdong province, China. Dynamic changes in the biomass and nutrient contents of litterfall were investigated over the course of the year. Significant differences (P < 0.05) in annual litterfall biomass were observed among the four treatments. Compared with the control group, the amount of annual litterfall biomass increased by 26.88% in the fertilization treatment and decreased by 6.57% and 17.99% in the weeding + fertilization and weeding treatments, respectively. Among all components of litter, the proportion of leaves was the largest (62.23%-73.55%), followed by sundries (14.75%-22.05%), with the proportion of flowers, fruits, and branches being the smallest. The monthly variation in litterfall biomass showed bimodal patterns, with peaks in summer and autumn. The annual nutrient return amounts of litterfall appeared in the order of N > K > P. The annual return amount of N increased by 56.26% and 14.25% under fertilization and weeding + fertilization, respectively, and decreased by 9.90% under weeding compared with the control. Compared with the control, the annual return amount of P increased by 28.34% in the fertilization treatment, whereas it decreased by 19.09% and 28.25% in the weeding + fertilization and weeding treatments, respectively. The annual return amount of K increased by 62.75% and 3.37% in the fertilization and weeding + fertilization treatments, respectively, whereas it decreased by 16.31% in the weeding treatment. A comprehensive analysis of the effects of different treatments on the biomass, composition, and nutrient return amount of litterfall showed that in the mixed plantation of Santalum album-Dalbergia odorifera, fertilization increased, whereas weeding reduced the amount of litterfall nutrient return.

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