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蔡蕾, 刘前程, 冯秋红, 等. 地被物调控对川西亚高山次生林枯落物持水性能的影响[J/OL]. 四川林业科技, 2024, 45[2024-05-14]. DOI: 10.12172/202309180001
引用本文: 蔡蕾, 刘前程, 冯秋红, 等. 地被物调控对川西亚高山次生林枯落物持水性能的影响[J/OL]. 四川林业科技, 2024, 45[2024-05-14]. DOI: 10.12172/202309180001
CAI L, LIU Q C, FENG Q H, et al. Effects of ground cover regulation on water holding capacity of litter in different secondary forests of subalpine in Western Sichuan[J/OL]. Journal of Sichuan Forestry Science and Technology, 2024, 45[2024-05-14]. DOI: 10.12172/202309180001
Citation: CAI L, LIU Q C, FENG Q H, et al. Effects of ground cover regulation on water holding capacity of litter in different secondary forests of subalpine in Western Sichuan[J/OL]. Journal of Sichuan Forestry Science and Technology, 2024, 45[2024-05-14]. DOI: 10.12172/202309180001

地被物调控对川西亚高山次生林枯落物持水性能的影响

Effects of ground cover regulation on water holding capacity of litter in different secondary forests of subalpine in Western Sichuan

  • 摘要: 为弄清地被物调控对次生林地水源涵养能力的影响,研究对阿坝州米亚罗林区3个退化程度(轻度、中度、重度)的红桦次生林分别进行了7个地被物调控处理,其中移出3个梯度(10%-C1、30%-C2、50%-C3)、输入3个梯度(10%-R1、30%-R2、50%-R3)、对照-CK,监测其枯落物持水性能的变化,结果显示:次生林的枯落物蓄积量受林分密度和林分结构以及分解速率影响,表现为中度退化>重度退化>轻度退化,枯落物最大持水量与蓄积量呈正相关,也表现为中度退化>重度退化>轻度退化,且中度退化次生林枯落物最大持水量比重度退化次生林高出50.45%,比轻度退化次生林高出57.42%。地被物调控后不同次生林蓄积量、最大持水量和有效拦蓄量均是R2处理(移入30%)最高,其中轻度退化次生林R2的最大持水量比CK(对照)高出35.48%;中度退化次生林R2的最大持水量比CK高出312.24%;重度退化次生林R2的最大持水量比CK高出47.93%。不同次生林最大持水率与最大持水量、蓄积量没有相关性,其中中度退化次生林R3的最大持水率(移入30%)最高,比CK高71.66%从监测数据来看,R2处理能较快地对提升枯落物持水性能作出响应,且在中度退化次生林的效果最好。

     

    Abstract: To clarify the effect of ground cover regulation on the water holding capacity of secondary forests, this study conducted a total of eight ground cover regulation treatments on red birch secondary forests of three degradation levels (mild, moderate and severe) in the Miyaluo Forest of Aba Prefecture, including three gradients of removal (10%-C1, 30%-C2 and 50%-C3), three gradients of input (10%-R1, 30%-R2 and 50%-R3), andCK, to monitor the changes in the water holding quality of its litter. The results showed that the litter volume of secondary forest was affected by stand density, stand structure and decomposition rate, which showed moderate degradation>severe degradation>light degradation, and the maximal water holding capacity was positively correlated with the litter volume, which showed moderate degradation>severe degradation>light degradation as well. The maximal water holding capacity of litter in moderately degraded secondary forest was 50.45% higher than that in severely degraded secondary forest and 57.42% higher than that in lightly degraded secondary forest. After one year of ground cover regulation, the litter volume, maximal water holding capacity and effective interception of different secondary forests were the highest in R2 (30%-R2) treatment. The maximal water holding capacity of R2 was 35.48% higher than that of CK; The maximal water holding capacity of R2 was 312.24% higher than that of CK; The maximal water holding capacity of R2 was 47.93% higher than that of CKn. The maximal water holding rate of different secondary forests was inconsistent with the maximal water holding capacity and litter volume. The ground cover treatment had a certain impact on the maximal water holding rate. The maximal water holding rate of the moderately degraded secondary forest R3 (30%-R2) treatment was the highest, which was 71.66% higher than that of CK; The maximal water holding rate of the severely degraded secondary forest was the highest in C2 treatment, which was 49.67% higher than that of CK. This suggests that in some cases some ground cover treatments may increase the maximal water holding rate, but the exact reasons for this remain to be investigated. From the data, R2 treatment can respond quickly to improve the water holding quality of litter, and the effect is the best in moderately degraded secondary forest.

     

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