论文部分内容阅读
４年试验结果表明，在杉木北带河南鸡公山花岗岩母岩发育的黄棕壤上，人工杉木幼林施肥后２年效应十分明显，第３年效应下降；施ＮＰ２Ｋ１混合肥（１００Ｎ＋１００Ｐ２Ｏ５＋１００ｋ２Ｏｋｇ／ｈｍ２）效应最好；在阳坡试区，施肥后３年，树高生长增加６８％，地径生长增加７８％；Ｐ２Ｋ１（１００Ｐ２Ｏ５＋１００Ｋ２Ｏｋｇ／ｈｍ２），Ｐ１Ｋ１（５０Ｐ２Ｏ５＋１００Ｋ２ＯＫ２Ｏｋｇ／ｈｍ２）和ＮＰ２（１００Ｎ＋１００Ｐ２Ｏ５ｋｇ／ｈｍ２）处理效应也较显著；单施Ｎ、Ｐ肥，前２年也有效应，但肥效低于ＮＰＫ混合肥，单施Ｋ肥效应不好。林分本底值对幼林生长影响极显著，干扰肥效
The result of 4 years showed that on the brown soil grown on the parent rock of Jigongshan granite in the north of the fir belt, the effect of young Cunninghamia lanceolata after two years of fertilization was obvious and the effect was decreased in the third year. NP2K1 mixed fertilizer (100N + 100P2O5 + 100k2Okg / hm2) In the sunny slope test area, the tree height increased by 68% and the diameter growth increased by 78% in the three years after fertilization. The treatment of P2K1 (100P2O5 + 100K2Okg / hm2), P1K1 (50P2O5 + 100K2OK2Okg / hm2) and NP2 (100N + 100P2O5kg / hm2) The effect is also more significant; single application of N, P fertilizer, the first two years are also effective, but the fertilizer efficiency lower than the NPK fertilizer, K fertilizer application alone is not good. The stand value at the end of the growth of young forest significantly affected, interfere with fertilizer efficiency