摘要
通过 5年实验研究 ,观测了杨树、沙棘、柏树、刺槐、元宝枫纯林和沙棘与杨树、沙棘与柏树、刺槐与柠条的混交林在风化岩沫土土壤、红胶泥土壤、黄绵土土壤上的成活率、年枝条生长量、5 a林冠面积、5 a郁闭度 ,分析得出了黄土丘陵区不同土壤类型造林树种选择和配置的模式。结果表明 :黄土丘陵区造林常见树种及其混交形式在不同土壤类型上呈现不同结果 ,风化岩沫土适合柏树纯林和沙棘与杨树混交、沙棘与柏树混交 ,红胶泥土壤最佳树种为沙棘、刺槐纯林及沙棘与杨树混交 (阴坡 )、沙棘与柏树混交、刺槐与柠条混交 ,而刺槐、柠条纯林和沙棘与杨树混交、沙棘与柏树混交、刺槐与柠条混交适合于黄绵土土壤。此外 ,在各种土壤类型上混交林都优于纯林 ,建议黄土丘陵区造林应乔灌混交为主。该项研究技术在延安市山川秀美工程中推广 ,效果明显 ,建议在黄土丘陵区推广该技术。
Using 5 year data including the survival percentage, yearly shoot increment, 5 year forest canopy and 5 year canopy cover observed from the test sample where 9 kinds of pure and mixed stand planted in loessal soil, Hongjiaoni soil and mantle rock soil separately, the suitable plant species in loess hilly areas are selected and their spatial arrangement models are proposed. The results show that different species planted in 3 kinds of soil give different outcomes. Mantle rock soil is suitable for pure Chinese weeping cypress stand, seabuchthorn and poplar mixed forest and black locust and caragana korshinskii mixed forest. The suitable plant species for Hongjiaoni soil are seabuchthorn and black locust pure stand, seabuchthorn and poplar mixed forest and seabuchthorn and Chinese weeping cypress mixed forest, black locust and caragana korshinskii pure stand, seabuchthorn and poplar mixed forest, seabuchthorn and Chinese weeping cypress mixed forest, and black locust and caragana korshinskii mixed forest are suitable for loessal soil. And the observed data show that the performance of mixed forests are better than which of pure species stand. So it is suggested that leading plant in loess lilly area should be mixed forest. This technique has been popularized in Yanan city, which turned on good effectiveness. It is suggested that the technique should be popularized in loess hilly area.
出处
《水土保持学报》
CSCD
北大核心
2002年第3期43-46,共4页
Journal of Soil and Water Conservation
基金
国家"九五"科技攻关项目 (96-0 0 4-0 5 -13 )
