马尾松造林施肥两年生长反应

Growth Response of Masson Pine Plantation to Fertilization:Two Years Results

马尾松造林施肥两年生长反应＊胡炳堂洪顺山关志山蔡宏明封剑文关键词马尾松、生长量、造林施肥、追肥马尾松（ＰｉｎｕｓｍａｓｏｎｉａｎａＬａｍｂ．）为我国特有树种，分布面广、适应性强、生长快、用途大，在我国林业生产建设中占有十分重要的地位［１］。长期以来，...

A fertilization trial of masson pine plantation was established on the red earth developed from granite in Shaowu City of Fujian Province in 1992.Two years, investigation show:The effectiveness of fertilization is tangible in the first year of planting and last to the second year.The total growth of height (H) ,groundline diameter (GLD) and crown width (CW) of the treatment plots is 14%￣26%,8%￣19% and 7%￣23% higher than that of the check (CK) plots,respectively.The growth response to three nutrients compound fertilizer (50 kg/hm 2 of N,P 2O 5,K 2O) is the best of all,with the current annual increment of H as 0.288 m (1 a),0.780 m (2 a) promoted by 44%,31% over CK.Next are to NP,PK and P,the H was promoted by 21%￣46% (1 a),8%￣31% (2 a) contrasting that of CK,respectively.There was no obvious difference between various P level treatments.Compared the effects of using calcium magnesium phosphate as basal or top dressing alone,only basal manure has significant response,there was no difference between P top dressing and CK.There is no obvious response to N or K fertilizer.So P is the deficient nutrient in such site.The application amount of 25 kg/hm 2 of P 2O 5 is enough for the soil.