Effects of Exotic Tree Species on Soil Physicochemical Property in Limu Mountain of Hainan

doi:10.13466/j.cnki.lyzygl.2022.03.016

Abstract

Abstract:

To explore the effects of main exotic tree species on soil physicochemical property in Hainan tropical rain forest national park.Soil sampling of exotic tree species community and secondary forest community was conducted by five-point sampling method,and determination of soil physicochemical property was conducted by chemical method.The results showed that the soil pH of secondary forest community was 4.79,which was lower than that of eucalyptus community and higher than that of secondary forest community.The soil organic matter content of secondary forest community was 31.01 g/kg,and the TN、TP、TK contents were 1.08 g/kg,2.27 g/kg and 1.83 g/kg,respectively,which were higher than those of exotic tree species community.Determination of ak showed that secondary forest community was lower than exotic tree species community.The NH₄⁺ content of secondary forest community was higher than exotic tree species community.In ap content,secondary forest community was lower than Acacia mangium and eucalyptus community,higher than Pinus caribaeamorele community,and there was no significant difference with Hevea brasiliensis community.Determination of NO₃^- showed,there was no significant difference between secondary forest community and Hevea brasiliensis community.The introduction of exotic tree species reduced the contents of soil organic matter and total nitrogen,potassium and phosphorus,and increased the contents of free soil nutrients.Eucalyptus weakened soil acidity while other exotic species tended to increase soil acidity.

Key words: Limu Mountain, exotic tree species, soil, pH value, organic matter, NPK

CLC Number:

S714.2

FANG Fazhi, LI Zhaojia, GUI Huiyin, WU Zhongqin. Effects of Exotic Tree Species on Soil Physicochemical Property in Limu Mountain of Hainan[J]. FOREST RESOURCES WANAGEMENT, 2022, 0(3): 104-109.

Figures/Tables 5

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样地编号	经纬度		海拔/m	坡向	坡度/(°)	郁闭度	优势树种	树龄/a
样地编号	纬度	经度	海拔/m	坡向	坡度/(°)	郁闭度	优势树种	树龄/a
J	19°9'48.43″	109°44'37.93″	606	南	25	0.70	加勒比松	26
D	19°11'4.18″	109°44'26.79″	650	南	26	0.70	鹅掌柴、木荷	8
X	19°11'33.76″	109°42'6.40″	277	西	4	0.65	橡胶树	7
M	19°12'38.96″	109°45'2.90″	505	西	26	0.75	马占相思	21
A	19°13'59.04″	109°46'56.39″	309	西南	30	0.30	桉树	10

指标	森林群落
指标	橡胶	马占相思	加勒比松	桉树	次生林
速效钾	30.47±0.32c	54.84±0.15b	24.8±0.02d	111.97±0.41a	18.19±1.1e
速效磷	2.52±0.01c	4.4±0.01b	1.71±0.02d	6.34±0.08a	2.48±0.09c
硝态氮	8.57±0.08d	36.02±0.66a	9.74±0.02c	16.37±0.18b	8.61±0.34d
铵态氮	0.73±0.01cd	0.52±0.02d	1.06±0.01c	3.05±0.08b	22.21±3.09a