低磷胁迫对不同油茶无性系幼苗生长及养分利用效率的影响

陈隆升; 陈永忠; 杨小胡; 汤浪涛; 王瑞; 王湘南; 彭邵锋

doi:10.3969/j.issn.1000-2006.2014.03.009

陈隆升,陈永忠,杨小胡,汤浪涛,王瑞,王湘南,彭邵锋

南京林业大学学报（自然科学版） ›› 2014, Vol. 38 ›› Issue (03) : 45-49.

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南京林业大学学报（自然科学版） ›› 2014, Vol. 38 ›› Issue (03) : 45-49. DOI: 10.3969/j.issn.1000-2006.2014.03.009

研究论文

低磷胁迫对不同油茶无性系幼苗生长及养分利用效率的影响

陈隆升^1,2,陈永忠^1,2*,杨小胡^1,2,汤浪涛³,王瑞^1,2,王湘南^1,2,彭邵锋^1,2

作者信息 +

Effects of low phosphorus stress on the growth and nutrient utilization efficiency of different Camellia oleifera clones

CHEN Longsheng^1,2, CHEN Yongzhong^1,2*, YANG Xiaohu^1,2,TANG Langtao³, WANG Rui^1,2, WANG Xiangnan^1,2, PENG Shaofeng^1,2

Author information +

文章历史 +

摘要

选择砂培处理的油茶无性系幼苗为对象,采用裂区设计,以0、0.05、0.5 mmol/L 3种磷处理水平(P₀、P₁、P₂)模拟低磷胁迫,研究低磷胁迫对5个油茶优良无性系生长及氮、磷、钾吸收利用效率的影响差异。结果表明:不同油茶无性系间耐低磷胁迫差异显著; 随低磷胁迫的加剧,各无性系的生物量和氮、磷吸收量减少,而利用率增加。无磷和低磷时湘林67和湘林69两个无性系的生物量和磷吸收量、利用效率均较高,叶片氮磷比(N/P)和叶片Δ(N/P)均较低,表明这两个无性系具有较好的体内磷养分循环利用机制,具备良好的耐低磷胁迫能力。

Abstract

A sand culture experiment with a split design was conducted to study the responses of seedlings of five Camellia oleifera clones under three levels of P stress(P₀(0 mmol/L), P₁(0.05 mmol/L), P₂(0.5 mmol/L)). The results showed that five clones were significantly different in tolerance to low phosphorus stress. With low P stress exacerbating, the biomass and the N and P absorption of tested clones decreased, whereas the nutrient utilization efficiency increased. In low P and P deficiency treatments, the biomass and the P absorption and utilization efficiency of Xianglin67 and Xianglin69 were higher. Leaf(N/P)and leaf Δ(N/P)ratio were lower. There were better phosphorus nutrient recycling mechanism in Xianglin67 and Xianglin69.Those clones could be considered to be excellent low P stress resistant clones.

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陈隆升,陈永忠,杨小胡,汤浪涛,王瑞,王湘南,彭邵锋. 低磷胁迫对不同油茶无性系幼苗生长及养分利用效率的影响[J]. 南京林业大学学报（自然科学版）. 2014, 38(03): 45-49 https://doi.org/10.3969/j.issn.1000-2006.2014.03.009

CHEN Longsheng, CHEN Yongzhong, YANG Xiaohu,TANG Langtao, WANG Rui, WANG Xiangnan, PENG Shaofeng. Effects of low phosphorus stress on the growth and nutrient utilization efficiency of different Camellia oleifera clones[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2014, 38(03): 45-49 https://doi.org/10.3969/j.issn.1000-2006.2014.03.009

中图分类号： Q945.12 S718

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基金

收稿日期:2013-02-21 修回日期:2013-06-09
基金项目:湖南省科技重大专项(2013FJ1006)
第一作者:陈隆升,助理研究员。*通信作者:陈永忠,研究员。E-mail:chenyongzhong06@163.com。
引文格式:陈隆升,陈永忠,杨小胡,等. 低磷胁迫对不同油茶无性系幼苗生长及养分利用效率的影响[J]. 南京林业大学学报:自然科学版,2014,38(3):45-49.