培育措施对巨桉纸浆原料林木材化学成分的影响Ⅱ.因素交互效应分析及最优化选择

利用造林密度、氮、磷、钾肥与巨桉纸浆原料林木材化学成分综合分之间的通用二次旋转效应模型,进行了因素的交互效应分析以及最优化选择。结果表明,高造林密度与中量氮肥或中量磷肥有助于木材化学综合分的提高;高造林密度与低量钾肥或低造林密度与高量钾肥有助于木材化学综合分的提高。氮肥与磷肥之间存在一定的互补性;氮肥与钾肥之间效应不明显;磷肥与钾肥之间存在一定的互补性。因素取95%的置信区间既丰产又优质的最佳综合农艺措施为:造林密度152～153N/667m2,氮肥54～61g/N,磷肥48～49g/N,钾肥45～52g/N。

Effect of Cultivation Measures on Wood Chemical Components of Eucalyptus grandis Pulpwood Ⅱ.Mutual Efficiency Analysis and Optimization Choice

By using the model of quadratic common rotation established between planting density, N, P, K and synthetic value of wood chemical components of Eucalyptus grandis Pulpwood, mutual-efficiency and optimization choice were done. High density and middle dosage of nitrogenous fertilizer can help the raise of wood chemical components value, and high density and middle dosage of phosphate fertilizer can get a high value of wood chemical components. High density and low dosage of potash fertilizer or low density and High dosage of potash fertilizer also can get a high value of wood chemical components. Nitrogenous fertilizer and phosphate fertilizer can exchange each other to a certain extent. Obvious interaction does not appear between nitrogenous fertilizer and potash fertilizer. Phosphate fertilizer and potash fertilizer also can exchange each other to a certain extent. When the four factors of density, N, P, K are in the confidence limit of 95%, the excellent cultivating pattern for high yield as well as high quality is the following: planting density is 152～153N/667m~2, N is 54～61g/N, P is 48～49g/N, K is 45～52g/N.