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通过对杉木连栽幼林进行不同配比的施肥试验及对土壤、针叶养分含量的监测研究,掌握了杉木幼林生长需肥规律,提出叶片中N、P、K营养元素含量适宜指标;确定了N、P、K肥料肥效主次;掌握了杉木生物量及其养分积累的分布规律;最佳施肥配方:每公顷施肥量尿素180kg、钙镁磷肥450kg、氯化钾90kg;五年生杉平均树高7.13m,平均胸径9.81cm,平均单株村积0.03131m~3,分别比对照提高20.4%、20.4%和62.7%,经济效益显著。
Through the fertilization experiment with different proportion of young plantations and the monitoring of soil and coniferous nutrient content, we got the rules of fertilizer requirement for growth of young Chinese fir plantations and put forward the appropriate indexes of N, P and K nutrient elements content in the plantations. N, P, K fertilizers primary effect; master the distribution of Chinese fir biomass and nutrient accumulation; the best fertilization formula: fertilizer per hectare urea 180kg, calcium magnesium phosphate 450kg, potassium chloride 90kg; average tree Height 7.13m, average diameter at breast height 9.81cm, the average single plant plot 0.03131m ~ 3, respectively, 20.4%, 20.4% and 62.7% higher than the control, respectively, with significant economic benefits.