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杉木(Cunninghamia Lanceolata)是我国速生乡土刚材树种,为亚热带丘陵山地速生丰产林的主要造林树种。林地由于连续栽杉,土壤肥力衰退,杉木出现一代不如一代的趋势。本研究试图通过人为投入来弥补已损失掉的杉木林地肥力,以缩短轮伐期,达到速生丰产目的,为杉木集约栽培探索一条新途径。杉木林施肥肥效问题,目前结论不同。叶仲节(1985年)报道,杉木幼林施用氮素化肥无效,施磷肥初期有效,施钾肥呈负效;杉木幼林施用有
Cunninghamia Lanceolata is a fast-growing indigenous wood-based tree species in China. It is the main afforestation species of fast-growing and high-yield forests in the subtropical hilly region. Due to the successive planting of fir in the woodland, the fertility of the soil is declining, and the generation of Chinese fir is inferior to that of the previous generation. In this study, we tried to make up the loss of the fertility of the Chinese fir plantation through man-made inputs to shorten the rotation period and achieve the purpose of fast-growing and high-yielding, so as to explore a new way for intensive cultivation of Chinese fir. Cunninghamia lanceolata fertilizer efficiency problems, the current conclusion is different. Ye Zhongjie (1985) reported that young Chinese fir plantations were ineffective with nitrogen fertilizers and early-stage phosphate fertilizers, with negative K-fertilizer application. Young Chinese fir plantations had