不同抚育措施对大果木莲生长的影响

The impacts of different tending measures on growth of Manglietia grandis

采用L9(34)正交试验设计,研究了不同抚育措施对大果木莲生长的影响。结果表明:锄草松土对大果木莲生长的影响最大,其次为施用尿素和氯化钾。大果木莲地径、胸径生长的优化组合为施用尿素75 g/株、过磷酸钙75 g/株、氯化钾25 g/株及锄草松土3次以及施用尿素75 g/株、过磷酸钙25 g/株、氯化钾50 g/株及锄草松土3次;高生长优化组合为施用尿素75 g/株、过磷酸钙75 g/株、氯化钾50 g/株及锄草松土3次组合效果最佳;冠幅生长以施用尿素50 g/株、过磷酸钙50 g/株、氯化钾50 g/株及锄草松土3次组合效果最佳。

The growth of Manglietia grandi~ under different tending measures was studied using L9 （3^4） orthogonal experi-mental designs. The results showed that the most influential factors were weeding and scarification, the secondly influential factors were another two factors carbamide and potassium chloride. The optimal combinations for the growth of ground diam-eter were the treatment of 75 g carbamide, 75 g calcium superphosphate, 25 g potassium chloride and weeding scarification 3 times, the DBH was 75 g carbamide, 25 g calcium superphosphate, 50 g potassium chloride and weeding scarification 3 times, the optimal combinations for the height were 75 g carbamide, 75 g calcium superphosphate, 50 g potassium chloride and weeding scarification 3 times, as well as the optimal combinations for the crown width were 50 g carbamide, 50 g calci-um superphosphate, 50 g potassium chloride and weeding scarification 3 times.