毛竹叶片衰老过程碳氮元素及灰分含量的季节动态  

Seasonal Changes of Carbon,Nitrogen and Ash Contents of Phyllostachys pubescens Leaves during Senescence

作　　者：潘贤强 

机构地区：[1]福建省永春县林业局,福建永春362600

出　　处：《福建林业科技》2011年第4期38-40,共3页Journal of Fujian Forestry Science and Technology

摘　　要：于2006年4月—2007年3月,对福建永春毛竹(Phyllostachys pubescens)成熟叶和老叶的C、N元素及灰分含量的季节动态及元素的内吸收率进行研究。结果表明:①毛竹成熟叶和老叶的C、N元素含量存在一定的季节变化,从成熟叶到老叶,C含量保持相对稳定,而N含量呈现下降趋势。②毛竹成熟叶、老叶灰分含量月变化趋势相似,毛竹成熟叶、老叶的灰分含量在秋季(10月)至翌年春季(3月)灰分含量较高,而春夏季相对较低;毛竹成熟叶的灰分含量在7.56%～15.91%之间,老叶的灰分含量在7.46%～16.67%,老叶灰分含量高于成熟叶(P=0.0199)。③毛竹叶片衰老过程N的内吸收率为36.68%。Seasonal changes of C,N and ash contents of the mature and senescent leaves of Phyllostachys pubescens in Yongchun County,Fujian were studied in this paper during April,2006～March,2007.Results were showed as follows：（1）C,N contents of mature and senescent leaves followed the seasonal pattern;During leaf senescence,C remained stable and N decreased,respectively;（2）mature and senescing leaves had the similar seasonal changes of the ash contents,with the high ash contents from October,2002 to March,2003 and the low ash contents during Spring and Summer;senescing leaves had the higher ash contents（7.46%～16.67%） than mature leaves（7.56%～15.91%）（P=0.0199）;（3）Retranslocation efficiency of N was 36.68%.

关 键 词：毛竹 衰老过程 碳氮元素 灰分 季节动态 内吸收率 

分 类 号：S795.7[农业科学—林木遗传育种]