摘要
利用一块天然小流域，研究了人工湿地松林内Ｋ、Ｐ、Ｃａ、Ｍｇ、Ｚｎ、Ｃｕ、Ｆｅ、Ｍｎ等矿质元素１９９３—１９９４年通过降雨输入、地表径流输出以及积累、留存、淋溶、归还、吸收等循环过程。湿地松林有较高的生产力（生物生产量２０．３４９ｔ／ｈｍ２·ａ，生长量９．４０８ｍ２／ｈｍ２·ａ），原因在于它对矿质元素有较高的利用率。林分矿质元素支出大于收入，在总体上，林地呈退化状态；并且归还量少，林分矿质元素循环效率低。建议采取人工措施调控湿地松林，以提高林分生产力，建立良性循环的生态系统。
Within the boundary of a small watershed covered with Pinus elliottii stand, the cycling process of K, P, Ca, Mg, Zn, Cu, Fe and Mn, including their average budget, accumulation, storage, leaching, return and absorption were studied in 1993-1994. The stand had high productivity(20. 349t/hm2·a and 9. 408m3/hm2·a)because of its high usage efficiency of mineral elements.The total amount of mineral elements input into the forest was less than that of output from it in 1993-1994. The forest was still on the degenerate state with less return amount and lower cycling efficiency. It is suggested to adjust and control such a forest by some artificial measures such as fertilization and mixed planting with broadleaved tree species.
出处
《林业科学》
CAS
CSCD
北大核心
1996年第4期298-304,共7页
Scientia Silvae Sinicae
基金
"八五"攻关课题
关键词
湿地松
人工林
营养循环
Pinus elliottii, Artificial forest, Nutrient cycle
