南亚热带马尾松人工林根系生物量分布格局

doi:10.16088/j.issn.1001-6600.2020.01.020

广西师范大学学报（自然科学版） ›› 2020, Vol. 38 ›› Issue (1): 149-156.doi: 10.16088/j.issn.1001-6600.2020.01.020

南亚热带马尾松人工林根系生物量分布格局

宋尊荣¹, 秦佳双¹, 李明金², 马姜明^1,3*, 钟凤跃², 杨章旗^3,4, 颜培栋^3,4

1. 珍稀濒危动植物生态与环境保护教育部重点实验室(广西师范大学),广西桂林541006;
2. 横县镇龙林场,广西横县530327;
3. 广西优良用材林资源培育重点实验室,广西南宁530002;
4. 广西壮族自治区林业科学研究院用材林研究所国家林业局马尾松工程技术研究中心,广西南宁530002

收稿日期:2018-09-20 出版日期:2020-01-25 发布日期:2020-01-15
通讯作者: 马姜明(1976—),男,江西永新人,广西师范大学教授,博士。E-mail:mjming03@163.com
基金资助:
广西创新驱动发展专项(广西重大专项)课题(桂科AA17204087-7);广西优良用材林资源培育重点实验室开放课题基金(2019-B-04-01)

Study on Root Biomass of Pinus massoniana Plantations in Subtropical China

SONG Zunrong¹, QIN Jiashuang¹, LI Mingjin², MA Jiangming^1,3*, ZHONG Fengyue², YANG Zhangqi^3,4, YAN Peidong^3,4

1.Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University),Ministry of Education, Guilin Guangxi 541006, China;
2.Zhenlong State-owned Forest Farm, Hengxian Guangxi 530327,China;
3. Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation, Guangxi Forestry Research Institute,Nanning Guangxi 530002, China;
4.Guangxi Institute of Forestry Science Timber Forest Research Institute, Masson PineEngineering Technology ResearchCenter of SFA (State Forestry Administration), Nanning Guangxi 530002, China

Received:2018-09-20 Online:2020-01-25 Published:2020-01-15

摘要/Abstract

摘要： 运用空间代替时间的方法,选取广西南亚热带4种不同林龄马尾松人工林为研究对象,研究其根系生物量空间分布格局,进而为探究马尾松人工林生长过程中的物质循环和养分流动,以及评价马尾松人工林生长状态提供参考。结果表明:(1)在0~60 cm的3个土壤层中,根系大部分集中在0~40 cm的土壤层中,分别为幼龄林(88.6%)、中龄林(92.56%)、成熟林(93.67%)、过熟林(86.24%)。其中在0~20 cm深的土壤层中根系生物量最大,在20~60 cm土壤层中,由成熟林(0.34 t/hm²)到过熟林(1.08 t/hm²)的过程根系生物量增幅最大。(2)4种林分不同径级根系分布格局有所不同,在幼龄林和中龄林中,细根(0~2 mm)与小根(2~5 mm)的占比较大,其所占比例之和分别为87.43%和79.32%,而根系径级越大所占比例越小;而在成熟林和过熟林中,中根(5~10 mm)与粗根(>10 mm)生物量占比相较于幼龄林和中龄林开始增大,中根生物量在由成熟林(0.75 t/hm²)到过熟林(1.94 t/hm²)的过程中增幅最大,粗根生物量在由中龄林(0.32 t/hm²)到成熟林(2.72 t/hm²)的过程中增幅最大。总体来看,根系总生物量随林龄的增加呈逐渐增大的趋势。根系生物量随着土壤深度的加深呈逐渐减少的趋势。方差分析表明,土壤深度对根系生物量的影响极显著(F=13.903,P<0.01),林龄对根系生物量的影响不显著(F=1.530,P=0.226)。

关键词: 根系生物量, 分布格局, 马尾松人工林, 广西南亚热带

Abstract: Focused on the biomass of root system in four different ages of Masson pine forests in Guangxi, this research was investigated in a way of space-for-time substitution. Furthermore, it provides a reference for exploring the material cycle and nutrient flow during the growth of Pinus massoniana plantation and the evaluation of the growth status of Pinus massoniana plantation. The results showed that: (1)Among the three soil layers of 0-60 cm, the roots are mostly concentrated in the soil layers of 0-40 cm, namely, young forest (88.6%), middle-aged forest (92.56%), mature forest (93.67%) and over-mature forest (86.24%). Among them, the root biomass is the most in the soil layer 0-20 cm deep, and increases the most between the mature forest (0.34 t/hm²) and the over-mature forest (1.08 t/hm²) in the two soil layers 20-60 cm deep. (2) The root distribution pattern of the four forest types is different in four diameter grades. In the young forest and the middle-aged forest, the proportion of fine roots (0-2 mm) and small roots (2-5 mm) are larger, and the sum of their proportions are 87.43% and 79.32%, respectively, while the larger the diameter grade, the smaller the proportion; In mature forest and over-mature forest, the biomass ratio of middle root(5-10 mm) to thick root (>10 mm) began to increase compared with that in young forest and middle age forest, the biomass of middle root increases the most between mature forest (0.75 t/hm²) and over-mature forest (1.94 t/hm²), and the biomass of thick root increases the most between middle age forest(0.32 t/hm²) and mature forest (2.72 t/hm²). Overall, the total biomass of root system increases gradually with the increase of forest age. Root biomass decreases gradually with the deepening of soil depth. By analysis of variance, the effect of soil depth (F=13.903, P<0.01) on root biomass is extremely significant, while the effect of forest age (F=1.530, P=0.226) on root biomass is not significant.

Key words: root biomass, distribution pattern, Pinus massoniana plantation, south subtropics of Guangxi

中图分类号:

S718.3

宋尊荣, 秦佳双, 李明金, 马姜明, 钟凤跃, 杨章旗, 颜培栋. 南亚热带马尾松人工林根系生物量分布格局[J]. 广西师范大学学报（自然科学版）, 2020, 38(1): 149-156.

SONG Zunrong, QIN Jiashuang, LI Mingjin, MA Jiangming, ZHONG Fengyue, YANG Zhangqi, YAN Peidong. Study on Root Biomass of Pinus massoniana Plantations in Subtropical China[J]. Journal of Guangxi Normal University(Natural Science Edition), 2020, 38(1): 149-156.

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南亚热带马尾松人工林根系生物量分布格局

Study on Root Biomass of Pinus massoniana Plantations in Subtropical China

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