摘要
以2年生云南松苗木作为试验材料,采用氮、磷2因素3水平试验设计,对云南松幼苗进行氮、磷叶面喷施,分析不同氮磷浓度叶面喷施对云南松苗木叶绿素含量的影响。结果表明:不同氮、磷浓度叶面喷施对云南松苗木叶绿素有一定的影响,表现为中氮低磷能有效促进云南松苗木叶绿素a含量、叶绿素b含量以及叶绿素(a+b)含量的增加。氮、磷叶面喷施也改变叶绿素a含量和叶绿素b含量的积累速度,且这种相对生长关系随时间会发生改变,在单施磷的情况下叶绿素a含量的积累速率相对于叶绿素b含量呈现先升高后降低的趋势,而在单施氮或氮磷配施情况下变化较为复杂。通过氮、磷叶面喷施用量与叶绿素含量间的回归关系构建了方程,单因素效应分析确定适宜的氮、磷叶面喷施用量。可见,氮、磷叶面喷施对叶绿素含量的提高有促进作用,以中氮低磷效果明显,以氮为主导因子,叶绿素a含量与叶绿素b含量的相对生长关系随氮、磷用量及测定时间发生变化。
This study was carried out in order to explore the effect on chlorophyll content of Pinus yunnanensis seedlings by different concentration of nitrogen and phosphorus foliar spraying.Two years P.yunnanensis seedlings were used as test materials by using experiment design of nitrogen(N)and phosphorus(P)with 3 levels of 2 factors.Nitrogen and phosphorus foliar fertilization were sprayed.The results showed that the different concentration of nitrogen and phosphorus foliar spraying influenced chlorophyll content for P.yunnanensis seedlings.Moderate nitrogen and low phosphorus can effectively promote the chlorophyll a,chlorophyll b and chlorophyll(a+b)content for P.yunnanensis seedling.Nitrogen and phosphorus foliar spraying changed the accumulation speed of chlorophyll a and chlorophyll b.And the relative growth relationship changed with the growth of P.yunnanensis seedling.In the case of fertilization of phosphorus accumulation rate of chlorophyll a,when compared to the chlorophyll b,showed that the first increased and then decreased.But the change were more complexly when the fertilization of nitrogen,or combination of nitrogen and phosphorus.By applying relationship between the dosage of nitrogen and phosphorus,and chlorophyll content,the regression equations were built.The appropriate nitrogen and phosphorus sprayed were gained by the effect analyses of single factor.Totally,nitrogen and phosphorus foliar spraying can promote chlorophyll content for P.yunnanensis seedling.Low phosphorus and moderate nitrogen was helpful for the increase of chlorophyll content for P.yunnanensis seedling.Nitrogen was the leading factor for the increasing of chlorophyll content for P.yunnanensis seedling.The relative growth relationship between chlorophyll a and chlorophyll b varied with the dosage of nitrogen and phosphorus,and test time.
作者
黄键
王德新
杨松
郑超凡
陆庄跃
许玉兰
Huang Jian;Wang Dexin;Yang Song;Zheng Chaofan;Lu Zhuangyue;Xu Yulan(Yunnan General Administration of Forestry Seeds and Seedlings,Kunming Yunnan 650215,China;College of Forestry,Southwest Forestry University,Kunming Yunnan 650233,China;Yunnan Academy of Biodiversity,Southwest Forestry University,Kunming Yunnan 650233,China)
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2023年第3期33-41,共9页
Journal of Southwest Forestry University：Natural Sciences
基金
云南省万人计划青年拔尖人才专项(YNWR-QNBJ-2019-075)资助
国家自然科学基金项目(31860203)资助
云南省研究生导师团队建设项目(2022-97)资助
校科研基金(01108-18200133)资助。
关键词
云南松
氮
磷
叶面施肥
叶绿素
苗木
Pinus yunnanensis
nitrogen
phosphorus
foliar fertilization
chlorophyll
seedling
