摘要:
研究了三倍体毛白杨Populus tomentosa 11个无性系(无性系号分别为S1, S2, S3, S4,S5, S6, S7, S8, S9, S11, S12)叶片营养元素(氮、磷、钾、钙、镁)质量分数的差异,并以二倍体毛白杨为对照(无性系号为S10)。结果表明: ①不同无性系间叶片氮质量分数差异达到了显著水平(P 0.05, n= 36),其中S11无性系氮质量分数最高,为24.56 gkg- 1;其次是S1无性系,为24.38 gkg- 1;最低氮质量分数为S9无性系,为21.23 gkg- 1。②不同无性系叶片磷质量分数差异未达到显著水平。③不同无性系间叶片钾质量分数差异达到了极显著水平(P 0.01, n= 36), 12个无性系中S4钾质量分数最高,为19.46 gkg- 1,其次为S11,为18.92 gkg- 1,对照S10无性系钾质量分数最低,为15.20 gkg- 1。④不同无性系间叶片钙质量分数差异达到了极显著水平(P 0.01, n= 36),其中对照S10无性系钙质量分数最高,为11.35 gkg- 1,其次是S12,为10.43 gkg- 1,最低为S8无性系,为5.93 gkg- 1。⑤不同无性系间叶片镁质量分数差异未达到显著水平。⑥与对照二倍体毛白杨比较,三倍体毛白杨无性系S11, S1, S6, S3, S7, S8, S4叶片氮元素质量分数均有所提高;三倍体11个无性系叶片钾元素质量分数均高于对照;而从叶片钙元素质量分数来看,三倍体11个无性
系均低于对照。⑦研究的11个三倍体毛白杨无性系叶片营养元素质量分数大小次序为:氮钾钙镁磷。图5表1参15
Abstract:
Concentrations of nutrients(N, P, K, Ca, and Mg) in leaves of triploid Populus tomentosa were studied with 12 treatments(11 triploid clones: S1,S2,S3, S4, S5, S6, S7, S8, S9, S11, S12) and a duple clone(S10)as a control.The results showed that compared to the control, concentrations ofN in clonesS11,S1,
S6,S3,S7,S8 and S4 were significantly greater(P 0.05, n= 36), concentrations of K in all triploid clones were significantly greater(P 0.01), concentrations of Ca in all triploid clones were significantly less(P0.01), and concentrations of P and Mg were not significantly different. N concentrations excluding the control
ranged from 24.56 gkg- 1(S11)to 21.23 gkg- 1(S9);P concentrations from1.81 gkg- 1(S5)to 1.24 gkg- 1(S2);Kconcentrations ranged from19.46 gkg- 1(S4)to 15.20 gkg- 1(S10);and Ca concentrations ranged from 11.35 gkg- 1(S10)to 5.93 gkg- 1(S8).Nutrient concentrations in leaves of triploid P. tomentosa were in the following order:N K Ca Mg P.[Ch, 5 fig. 1 tab. 15 ref.]
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