不同林龄杉木组织迁移养分的再利用

吕中诚,康文星,黄志宏,赵仲辉,邓湘雯

Reuse of retranslocated nutrients in tissues of Chinese fir in plantations of different ages

LÜ Zhong-Cheng,KANG Wen-Xing,HUANG Zhi-Hong,ZHAO Zhong-Hui,DENG Xiang-Wen

表4 杉木林在不同林龄阶段年吸收的土壤养分

Table 4 Annual nutrients taken up from soils by Chinese fir plantations at different ages

林龄 Stand age (a)	生产力 Prolificacy (t·hm^-2·a^-1)	计算公式 Calculation formula	养分元素 Nutrient elements (kg·hm^-2·a^-1)					合计 Total (kg·hm^-2·a^-1)
林龄 Stand age (a)	生产力 Prolificacy (t·hm^-2·a^-1)	计算公式 Calculation formula	磷 Phosphorus	氮 Nitrogen	钾 Potassium	钙 Calcium	镁 Magnesium	合计 Total (kg·hm^-2·a^-1)
1-7	6.17	ARR	2.92	30.43	21.44	28.66	7.54	90.79
1-7	6.17	公式(8) Formula (8)	2.74	29.18	20.14	28.47	7.42	87.57
8-11	10.63	ARR	5.60	57.30	36.45	50.26	14.47	164.08
8-11	10.63	公式(8) Formula (8)	5.31	54.93	32.77	51.33	15.09	159.43
12-16	11.31	ARR	5.79	61.09	37.79	53.10	15.35	173.10
12-16	11.31	公式(7) Formula (7)	4.18	50.17	28.27	49.60	13.99	146.21
17-20	16.51	ARR	6.72	73.30	44.69	58.24	16.41	199.36
17-20	16.51	公式(7) Formula (7)	4.28	56.79	31.31	53.42	14.92	160.72
21-25	14.45	ARR	5.61	60.77	38.46	48.66	13.70	167.19
21-25	14.45	公式(7) Formula (7)	3.45	45.60	26.75	44.30	12.63	132.73