摘要
研究不同施肥处理对5年生文冠果叶绿素（Chl）含量、叶片净光合速率（Pn）和新梢长的影响。结果表明,5-9月份,所有处理的Chl含量和Pn随着时间的推移均呈先升后降的趋势,在7月达到最高值;施肥能够极显著地增加新梢长度;所有处理中N2P1K2处理的Chl含量、Pn和新梢长度值均为最高;随着氮、磷、钾单一施肥量的增加,Chl含量、Pn和新梢长均呈先升后降的趋势;适宜的氮（N 110g·株-1）、磷（P2O540g·株-1）、钾（K2O 80g·株-1）用量及其配施能够明显增加文冠果的Chl含量、Pn和新梢长。可见,适宜的施肥量可有效增强文冠果的光合能力,推迟叶绿素的降解时间,并能保持较长的高光合持续期,进而促进新生枝条的生长。
Different fertilization treatments were adopted to investigate their influences on chlorophyll（Chl） content,net photosynthetic rate（Pn）and the length of newborn branch（LNB）of 5aborn Xanthoceras sorbifolia.The results indicated that from May to September,the contents of Chl and Pnof the plants of all treatments tended to increase first and then decrease,the peak values were found in July.Fertilization could significantly promote LNB.The highest values of Chl content,Pnand LNB were found in N2P1K2treatment.Along with the increase of the amount of applying single component of N,P,and K,Chl content,Pn and LNB tended to increase first,and then decrease.The appropriate amounts of N（N 110g per plant）,P（P2O540g per plant）,and K（K2O 80g per plant）,or their combination could significantly improve the Chl content,Pnand LNB.It was concluded that suitable fertilizing amounts could effectively enhance the photosynthetic capacity,delay the decomposition time of chlorophyll,which can maintain a longer duration time of higher photosynthetic to promote the growth of newborn branch of X.sorbifolia.
出处
《西北林学院学报》
CSCD
北大核心
2014年第3期27-31,共5页
Journal of Northwest Forestry University
基金
国家林业局推广项目([2012]72)
关键词
文冠果
施肥
净光合速率
叶绿素含量
Xanthoceras sorbifolia
fertilizer
net photosynthetic rate
chlorophyll content
