论文部分内容阅读
两年试验观测表明，湿地松幼林施基肥肥效明显优于追肥，施ＮＰ、ＰＫ、ＮＰＫ等配比肥优于单一肥种，Ｐ肥肥效优于Ｋ、Ｎ肥，追施Ｎ、Ｋ肥出现负效应；对其生长量进行研究，结果表明，湿地松幼林生长呈双峰趋势，４月和７月为生长高峰期，造林当年施入ＮＰ、ＮＰＫ等配比肥，次年生长可维持３个月的高峰期。造林当年施入ＮＰ、ＮＰＫ做基肥或次年４月份前施入适量Ｐ肥，均可使肥效得到充分发挥
The results of two years experiment showed that the fertilizer application efficiency of the young base forest of Pinus elliottii was significantly better than that of the top dressing, and NP, PK and NPK were better than the single fertilizer, P fertilizer was better than K, N fertilizer, top dressing N, K fertilizer appeared The results showed that the growth of young plantation of Pinus elliottii had a double-peak trend, April and July were the peak growth period, and NP, NPK and other fertilizers were applied in the afforestation year. The growth of next year could be maintained at 3 The peak of months. Afforestation year into the NP, NPK to do the base fertilizer or the amount of P fertilizer before April the following year, can make fertilizer give full play