滴灌施肥条件下107杨幼林N、P、K养分吸收量与施肥量研究  

Study on N,P,and K Uptake and Fertilization of Young‘107'Poplar Clone with Drip Irrigation

作　　者：贺勇[1] 兰再平[1] 孙尚伟[1] 傅建平 刘俊琴[1] 

机构地区：[1]中国林业科学研究院世界银行项目办公室,北京100091 [2]大兴区林场,北京102602

出　　处：《林业科学研究》2015年第3期426-430,共5页Forest Research

基　　金：国家林业局引进国际先进林业科学技术项目"速生丰产林自动化节水灌溉与高效栽培管理技术引进"(2009-4-48)

摘　　要：杨树以其生长迅速、产量大、分布广、适应性强、易繁殖、易更新等特性，成为我国主要的速生造林树种，常作为短轮伐期工业用材来经营；同时，它在解决我国用材短缺和生态问题等方面也起着不可忽视的作用。在营造速生丰产林的过程中，施肥是一项关键措施，多项研究结果表明，施肥对杨树树高、胸径的生长具有促进作用，不同施肥处理对杨树生长的影响不同。水和肥（主要是N肥）是影响杨树生长的重要因素，一直以来，Taking ‘107＇ poplar clone （ Populus x euramericana cv. ‘74/76＇ ）plantation cultivated with surface drip irrigation at sandy land of ancient Yongding River bed in Beijing as the research object, the effects of N, P, and K absorption and accumulation as well as different N fertilization gradient on the growth of 2- and 3-year-old ‘107＇ poplar clone were studied so as to determine the optimum amount of fertilization for young （2 or 3 year-old） poplar. The results showed that ： （ 1 ） The nutrient uptake of 1- to 3-year-old ＇ 107＇ poplar clone increased year by year, the uptake in the third year was significantly greater than that in the previous two years, and the demand for various nu- trients in the order of N 〉 K 〉 P. （2） The growth of 2-year-old ‘107＇ poplar clone showed no significant difference among various treatments, the minimum N fertilizer （30 g per tree） was the best, the corresponding P was 15 g per tree, K 20 g per tree,which were close to the result of N, P, and K nutrient absorption of2-year-old ‘107＇ poplar clone plant （ N 28.3 g, P 6.2 g, and K 18.9 g）. （3） Among various treatments, the increment of volume of 3- year-old ＇ 107＇ poplar clone increased with the increase of N fertilizer. N fertilizer of 80 g per tree achieved the min- imum volume increment, and there was significant difference between it and other treatments; 200 g per tree a- chieved the maximum volume increment, but there was no significant difference among treatments except 80 g per tree of N fertilizer treatment, so 120g N fertilizer per tree was the minimum fertilizer to meet the need for 3-year-old ‘107＇ poplar clone to grow, the corresponding P was 20 g per tree, K 50 g per tree,which was close to the result of N, P, and K nutrient absorption for 3-year-old ‘107＇ poplar clone （N 111.8 g, P 16.9 g, and K 43.8 g）. 4） Marginal benefit analysis for 3-year-old ‘107＇ poplar clone plantation showed that N fertilization of 120 g per tree could achieve the ma

关 键 词：107杨人工林 滴灌 施肥 N、P、K养分 

分 类 号：S792.11[农业科学—林木遗传育种]