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

doi:10.3969/j.issn.1000-2006.2014.03.009

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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

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

1.湖南省林业科学院,湖南长沙 410004;
2.国家油茶工程技术研究中心,湖南长沙 410004;
3.湖南省益阳市赫山区林业局,湖南益阳 413000

出版日期:2014-05-15 发布日期:2014-05-15
基金资助:
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.

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

1.Hunan Academy of Forestry, Changsha 410004,China;
2.National Engineering Research Center for Oil-tea Camellia, Changsha 410004,China;
3.Forestry Bureau of Heshan Distric Yiyang city, Hunan Province, Yiyang 413000,China

Online:2014-05-15 Published:2014-05-15

摘要/Abstract

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.

中图分类号:

Q945.12
S718

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(03): 45-49.

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 (Natural Science Edition), 2014, 38(03): 45-49.DOI: 10.3969/j.issn.1000-2006.2014.03.009.

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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

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

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