摘要
为探究不同梯度磷添加对荆条幼苗光合特征的影响,设置4个磷添加水平0、10、20、30 gP/(m 2·a)(分别以CK、LP、MP、HP表示)的荆条幼苗盆栽试验。结果表明,4种施磷处理下的荆条叶片在净光合速率、胞间CO 2浓度、气孔导度和蒸腾速率上整体表现为前期低、后期高;不同施磷处理下荆条幼苗叶片的净光合速率、胞间CO 2浓度、蒸腾速率、气孔导度最低值均出现在CK处理,净光合速率、胞间CO 2浓度、气孔导度最高值出现在MP处理,分别为10.5μmol/(m 2·s),311μmol/mol,153.6 mmol/(m 2·s),蒸腾速率最高值出现在HP处理,为4.4 mmol/(m 2·s)。相比较CK以上4项指标分别增加108.7%、52.7%、113.4%和73.7%。说明施磷能够显著提高荆条叶片的光合水平,对荆条的生长发育有促进作用,且20 gPm 2/a施磷量即MP处理对荆条光合作用的提升效果最显著。
The main purpose of this study was to investigate the effect of different gradients of phosphorus addition on the photosynthetic characteristics of ViteXnegundo seedlings.The purpose is to investigate whether phosphorus application has a significant effect on improving the photosynthetic capacity of the wattle,and analyzes the effect of different gradients of phosphorus addition on the photosynthetic characteristics of wattle seedlings,so as to analyze the amount of phosphorus application that has the most obvious effect on the growth and development of the wattle.The ecological restoration in the southern foot area provides a theoretical basis.This experiment is a pot experiment in the field.The four phosphorus addition levels in this study were 0,10,20,and 30 g P/(m 2·a),expressed as CK,LP,MP,and HP.Phosphorus treatment uses inorganic phosphorus(NaH 2 PO 4).The frequency is once a month and a total of 4 times are added.The results showed that the net photosynthetic rate,intercellular CO 2 concentration,stomatal conductance and transpiration rate of the leaves of the wattle under the four phosphorus treatments were generally low in the early stage and high in the latter stage;The lowest values of intercellular CO 2 concentration,transpiration rate,and stomatal conductance all appeared in CK treatment,and the highest values of net photosynthetic rate,intercellular CO 2 concentration,stomatal conductance appeared in MP treatment,which were 10.5μmol/(m 2·s),311μmol/mol,153.6 mmol/(m 2·s),the highest value of transpiration rate appeared in HP treatment,which was 4.4 mmol/(m 2·s),Compared with CK,the four indicators increased by up to 108.7%,52.7%,113.4%and 73.7%respectively.Phosphorus application can significantly improve the photosynthesis level of the wattles,and promote the growth and development of the wattles.The phosphorus application amount of 20 gP/(m 2·a),that is,the MP treatment has the most significant effect on the improvement of wattles photosynthesis.
作者
赵琛迪
刘雅辰
杨子
范世献
胡启立
余洁
赵勇
ZHAO Chen-di;LIU Ya-chen;YANG Zi;FAN Shi-xian;HU Qi-li;YU Jie;ZHAO Yong(Forestry College of Henan Agricultural University,Zhengzhou Henan 450002,P.R.China)
出处
《西部林业科学》
CAS
北大核心
2020年第6期94-99,共6页
Journal of West China Forestry Science
基金
国家自然科学基金项目(31270750)
国家自然科学基金项目(30601458)。
关键词
磷添加
光和特征
净光合速率
相关性
phosphorus addition
light and characteristics
net photosynthetic rate
correlation
