杉木优良家系幼林密度和施肥试验研究

A STUDY OF FERTILIZATION AND AFFORESTATION DENSITY ON FINE FAMILY YOUNG PLANTATION OF CUNNINGHAMIA LANCEOLATA

通过对福建省明溪县夏阳乡杉木良种幼林进行５个家系、５种密度、３种肥料的试验，结果表明：不同家系、密度、肥料间的效应不同。各家系间杉木幼林的生长差异显著（Ｆ＝４．３０），施肥对不同家系的增长效果不尽相同，其中以Ａ、Ｄ家系生长效果最好；不同密度对各家系幼林的施肥效果影响也不相同，以中等密度的杉木幼林施肥效果最好；磷肥对杉木幼林的增长效果较为明显，氮肥效果则不明显。

The multiple test study, including five families, five kinds of afforestation density and three kinds of fertilizer, proceeded between 1991 in fine variety young plantation of Cunninghamia lanceolata at Xiayang Mingxi, Fujian Province. The main results showed as follows: The responses to different kinds of family, density and fertilizer were different. The difference of growth among variant families was notable(F=4 30 *). Variant families had various growth response to fertilization, family A and D grew best among all tested families. Afforestation density could affect the response to fertilization, it′s suitable to fertilize in the yuong plantation with middling density of 1800～3000 plants per hectare. The Test also showed that phosphate fertilizer efficiency was better than nitrogen in young plantation of Cunninghamia lanceolata.