摘要
林木苗期营养诊断和施肥研究是制定合理施肥方案的前提,能为提高苗木质量和造林成活率提供重要的科学依据。以福建漳平五一国有林场多年筛选的速生型杉木为试验材料,通过开展室内模拟不同的土壤养分条件,采用二次通用旋转设计的施肥方法,根据杉木生物量划分高、低产组,利用DRIS营养诊断的图解法和指数法,计算杉木适宜的施肥范围及需肥顺序。结合图解法和指数法两种分析方法得出:杉木植株中氮、磷、钾养分的适宜比值范围为P/N=0.137±0.03,N/K=1.102±0.113,K/P=6.881±1.203;处理7(施氮量为0.511 g/盆,施磷量为0.270 g/盆,施钾量为1.339 g/盆)的平衡状态最佳。总体而言,速生型杉木对钾肥的需求量相对较大,对磷肥的需求量次之,对氮肥的需求相对较弱。
Research on nutrient diagnosis and fertilization of forest seedling are necessary for reasonable fertilizer application.It also can be an important scientific basis for improving the quality of seedlings and the afforestation survival rate. In this study,one year old Chinese fir seedling was selected as the test materials for its economic value and fast growth. The experiment was carried out in the state owned forest farms in Fujian Zhangping. The laboratory simulation was conducted in different soil nutrient conditions,using the fertilization method of quadratic general rotary design. The production of Chinese fir biomass was divided into various levels before using DRIS nutrition diagnosis graphic and index method. These methods were used to calculate the appropriate range of fertilization in different fertilizer order. The resulted showed as follows： The suitable ratio range among N,P,K nutrients for the Chinese fir plant were P / N = 0. 137 ± 0. 03,N / K = 1. 102 ± 0. 113 and K / P = 6. 881± 1. 203. The best equilibrium of nutrients sets in group 7（ in which nitrogen was 0. 511 g / pot,phosphorus content was0. 270 g / pot,and the amount of potassium was 1. 339 g / pot）. Overall,the fast-growing fir demanded mostly for K,and then followed by P and N.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2017年第1期73-79,共7页
Soil and Fertilizer Sciences in China
基金
福建省科技厅重点项目(2014N0002)
关键词
施肥
杉木苗期
二次通用旋转设计
营养诊断
fertilization
Chinese fir seedling
quadratic rotation design
DRIS
