不同氮、磷、钾配比施肥对红锥幼林生长的影响

Effects of Fertilization with Different Ratios of N,P and K on Growth of Young Castanopsis hystrix Plantation

以红锥(Castanopsis hystrix)幼龄人工林为材料,采用3因素3水平正交试验,研究氮、磷、钾配比施肥对红锥幼林生长的影响,为施肥提供科学依据。结果表明,各处理的树高和胸径相对增量及根、枝干和叶的生物量均高于CK;T4处理的叶生物量最高,T5处理的树高、胸径相对增量和根、枝干生物量最高;不同施肥处理下各生长指标差异显著。T4处理(N 87.5 g/株,P2O581.3 g/株,K2O 50.0 g/株)和T5处理(N 87.5 g/株,P2O5162.5 g/株,K2O 75.0 g/株)为红椎幼林较为适宜的施肥配方。

Using young Castanopsis hystrix plantations as experimental materials,effects of fertilization with different ratios of N,P and K on growth of young C.hystrix plantations were analyzed by three-factor and three-level orthogonal experiment to provide scientific basis for fertilization.Results showed that relative increments of tree height and DBH,biomass of root,stem and leaf in different treatments were higher than those of CK.T4 reached the maximum in leaf biomass,and T5 reached the maximum in increments of tree height and DBH,biomass of stem and root.There were significant differences in growth indexes in different fertilization treatments.T4(N 87.5 g/plant,P2O581.3 g/plant,K2O 50.0 g/plant)and T5(N 87.5 g/plant,P2O5162.5 g/plant,K2O 75.0 g/plant)were suitable fertilization for young C.hystrix plantations.