湖南祁阳县土壤酸化主要驱动因素贡献解析

周海燕,徐明岗,蔡泽江,文石林,吴红慧

Quantitative Analysis of Driving-Factors of Soil Acidification in Qiyang County, Hunan Province

ZHOU HaiYan,XU MingGang,CAI ZeJiang,WEN ShiLin,WU HongHui

表5 祁阳县主要经济林生物量及枝干和果实养分含量^{[34,35,36,37]}

Table 5 Wood biomass, element contents in stem, branches and fruits for typical economic forests

林木类型 Tree species	面积 Area (hm²）	生物量 Biomass (kg·hm^-2)		枝干养分含量 Element content in stem wood (%)					果实养分含量 Element content in fruits (%)
林木类型 Tree species	面积 Area (hm²）	枝干 Stems and branches	果实 Fruits	N	P	K	Ca	Mg	N	P	K	Ca	Mg
板栗Chestnut	137	13725	3750	0.978	0.186	0.253	1.400	0.210	1.376	0.27	0.664	2.048	0.222
油茶林Camellia oleifera	28513	7681	1798	0.65	0.045	0.31	0.129	0.131	0.831	0.093	0.971	0.437	0.129
柑橘Citrus	2068	26190	40397	0.513	0.070	0.420	1.193	0.247	0.158	0.052	0.236	0.062	0.016