N, P, K formulas for fertilization with young Phoebe bournei plantations in Fujian Province
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摘要: 采用3因素2次D-饱和最优设计,在福建明溪进行田间试验,分析了氮、磷、钾及其配比对闽楠Phoebe bournei幼树生长的影响。结果表明:氮、磷、钾肥对闽楠的树高和冠幅生长作用大小依次为氮肥>磷肥>钾肥,对粗(地径)生长作用大小依次为磷肥>氮肥>钾肥, 且作用效果均为正效应。采用频率分析法对各效应函数进行寻优,结果认为:当目标树高y1120%试验对照(ck),目标地径y2120%试验对照(ck),目标冠幅y3110%试验对照(ck)时,在95%置信区间内,试验地闽楠人工幼林的优化施肥量为氮(N)16.81~21.61 g株-1、磷(P2O5) 5.76~9.64 g株-1、钾(K2O) 3.31~6.44 g株-1,m(氮)∶m(磷)∶m(钾)的最佳比例为3.94∶1.57∶1.00。表3参15Abstract: In order to improve the fertilization effectiveness of young Phoebe bournei plantations. A field experiment was conducted in Mingxi County of Fujian Province based on a D-saturated optimal design with three factors: N, P, and K. The growth effects for young P. bournei plantations were then examined with a frequency analysis and RCB. Results showed that N, P, and K fertilizer efficiency was positive for growth of tree height and crown width (with N>P>K) and for increasing diameter at ground-level (with P>N>K). The frequency analysis showed that compared to ck, the expected tree height was 120%, the expected diameter at ground-level was 120% and the expected crown width was 110%. In these experimental plots, optimum fertilization rates (in gtree-1) for young P. bournei plantations were 16.81-21.61 for N, 5.76-9.64 for P2O5, and 3.31-6.44 for K2O with a 95% confidence interval with a frequency analysis method; the best ratio of m(N):m(P2O5):m(K2O) was 3.94:1.57:1.00. Then providing the basis for scientific fertilization of P. bournei plantations.[Ch, 3 tab. 15 ref.]
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Key words:
- silviculture /
- Phoebe bournei /
- growth /
- optimal fertilization model /
- N, P, and K application
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2015.01.013
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