缓释氮肥对马尾松幼林人工林生长的影响

Effect of Slow-Release Nitrogen Fertilizer on the Growth of YoungPinus massoniana Plantations

为探究缓释氮肥对马尾松幼林人工林生长的影响。以贵州省惠水县为试验地点,设置B:氮肥,C:磷肥,D:钾肥3个试验组和A(不施肥)1个对照组,对不同施肥方式下马尾松幼林的生长情况和生物量2个方面进行评估,比较不同施肥方案对马尾松幼林品质及生物量的影响。结果表明:处理组B(氮肥)马尾松幼林的生长状况总体较好,其株高、材积、胸径分别为:3.87 m、0.0044 m3、4.84 cm,较处理组A分别增长了:24.04%、37.5%、10.05%;处理组B(氮肥)马尾松幼林的生物量积累状况总体较好,其枝干生物量为5.24 t/hm2,针叶生物量为3.87 t/hm2,根系生物量为4.77 t/hm2,整株生物量为14.27 t/hm2,相较于处理组A分别增长了:142.59%、138.88%、116.29%、104.15%。不同施肥方式对马尾松幼林的生长指标和生物量产生了明显差异。施用氮肥(处理组B)的效果最好,促进了幼林的株高、材积和胸径的增长,以及林木各部位生物量的积累。施用磷肥(处理组C)和钾肥(处理组D)对于马尾松幼林的生长也有一定积极影响,但效果较氮肥差。研究可为马尾松幼林的科学施肥提供理论依据。

This paper aims to investigate the effect of slow-release nitrogen fertilizer on the growth of young Pinus massoniana plantations.This study took Huishui County,Guizhou Province as the experimental site,and set up three experimental groups:B:nitrogen fertilizer,C:phosphorus fertilizer,D:potassium fertilizer,and A(no fertilization)one control group to evaluate the growth and biomass of young Pinus massoniana forests under different fertilization methods.The effects of different fertilization schemes on the quality and biomass of young Pinus massoniana forests were compared.The growth status of young Pinus massoniana forests in treatment group B(nitrogen fertilizer)was generally good,with plant height,volume,and diameter at breast height of 3.87 m,0.0044 m 3,and 4.84 cm,respectively,which increased by 24.04%,37.5%,and 10.05%compared to treatment group A;The biomass accumulation of young Pinus massoniana forest in treatment group B(nitrogen fertilizer)is generally good,with branch biomass of 5.24 t/hm 2,needle biomass of 3.87 t/hm 2,root biomass of 4.77 t/hm 2,and whole plant biomass of 14.27 t/hm 2.Compared with treatment group A,the biomass increased by 142.59%,138.88%,116.29%,and 104.15%,respectively.Different fertilization methods have significant differences in the growth indicators and biomass of young Pinus massoniana forests.The application of nitrogen fertilizer(treatment group B)has the best effect,promoting the growth of young forest height,volume,and diameter at breast height,as well as the accumulation of biomass in various parts of the forest.The application of phosphorus fertilizer(treatment group C)and potassium fertilizer(treatment group D)also has a certain positive effect on the growth of young Pinus massoniana forests,but the effect is worse than that of nitrogen fertilizer.This study provides a theoretical basis for scientific fertilization of young Pinus massoniana forests.