摘要
采用正交设计L9(34)布置氮、磷、钾3因素3水平的肥料试验,研究氮、磷、钾配施对毛白杨杂种无性系苗木生长及生理特性的影响。结果表明:1)不同的施肥处理对相同系号的苗木影响不同,而不同系号的苗木对相同施肥处理响应也不一致,因此不仅要找出最佳的氮、磷、钾施肥量及其比例,而且要针对不同的无性系制定不同的施肥配方;2)毛白杨杂种无性系的生长和生理特征对于不同施肥配方的响应不完全一致,毛白杨杂种无性系S86号的最佳施肥配方为N(3g)+P2O5(2.25g)+K2O(0g),46号的最佳配比为N(5g)+P2O5(4.5g)+K2O(1g);3)毛白杨杂种无性系S86和46号处理间净光合速率×总叶面积(PTL)较净光合速率(Pn)差异更显著,并且与生长的相关性要高于净光合速率与生长的相关性,相关系数在0.80以上;4)不同的氮、磷、钾配施处理对毛白杨杂种无性系苗木各项生长指标和生理指标有显著影响,以氮肥影响最大,磷和钾肥影响较小。该研究对毛白杨杂种无性系的合理施肥具有理论和实际指导意义。
In order to study the effects of different proportion of N,P,K on seedling growth and physiological properties of hybrid clones of Populus tomentosa,seedlings were treated with fertilizer combinations of nitrogen,phosphorus and potassium at three different levels in an orthogonal experimental design L9 （34 ）. The results were as follows：Different fertilizing treatments produced different effects on seedlings of the same Populus tomentosa clone,and different clones responded differentially to the same fertilizing treatment. Therefore,optimum amounts and ratio of fertilization of N,P,K must be determined in terms of each individual clones; Seedling growth and phyosiological properties of the hydribd clones responded differentially to fertilizer treatments,and the optimum ratio of N,P,K for clone S86 was N （3 g） ＋ P2O5 （2. 25 g） ＋ K2O（0 g）; The optimum ratio of N,P,K for clone No. 46 was N （5 g） ＋ P2O5（4. 5 g） ＋ K2O（1 g）. The effects of different fertilizing treatments on net photosynthetic rate × total leaf area （PTL） were more significantly different than that on net photosynthetic rate,and net photosynthetic rate × total leaf area showed a closer correlation with growth （r 0. 80）. Different fertilizing treatments had significant effects on seedling growth and physiological properties of the hybrid clones. The effect of nitrogen was the greatest,followed by phosphorus and potassium. This research is of theoretical and practical significance for proper fertilization of hybrid clones of Populus tomentosa.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2010年第4期70-77,共8页
Scientia Silvae Sinicae
基金
“十一五”国家科技支撑计划课题(2006BAD24B04)
关键词
毛白杨
苗高
地径
生物量
Populus tomentosa
seedling height
ground diameter
biomass
作者简介
李吉跃为通讯作者。
