摘要
【目的】探究氮磷叶面喷施对云南松苗木营养元素储量的影响,为云南松苗木的促成培育提供理论依据。【方法】采用氮、磷2因素各3水平共9个处理的试验设计,以2年生云南松为试验材料进行氮磷叶面喷施,每隔2个月测定云南松苗木的氮磷钾营养元素,分析不同施肥水平对营养元素积累、分配和结构特征的影响。【结果】氮磷喷施可促进云南松苗木氮磷钾储量的积累。8月时,T_(8)处理(N 0.50%,P 0.40%)对单株氮磷钾储量积累的效果最好;10月时,T_(4)处理(N 0.25%,P 0.20%)对单株氮磷钾储量积累的效果最好;12月时,T_(7)处理(N 0.50%,P 0.20%)对单株磷钾储量积累的效果最好。在不同器官中,以叶的氮磷钾储量分配占比较高。从营养元素储量分配来看,T_(4)处理对地上部氮磷储量分配的提升效果较好,T_(5)处理(N 0.25%,P 0.40%)对地上部钾储量分配的提升效果较好。在营养元素储量的结构特征中,氮磷配施可降低氮磷钾储量的根冠比,降低钾储量的茎叶比,提高氮磷钾储量的光合器官与非光合器官比。【结论】氮磷叶面施肥可促进云南松苗木营养元素储量的积累,增加茎、叶营养元素储量的分配,降低根冠比。通过分析营养元素的变化,筛选合适的氮磷肥施用量,可为云南松苗木的促成培育提供理论依据。
[Purpose]To explore the effects of nitrogen and phosphorus foliar spraying on the nutrient element reserves of Pinus yunnanensis seedlings,providing theoretical basis for promoting the cultivation of P.yunnanensis seedlings.[Methods]A total of nine treatments with three levels of nitrogen(N)and phosphorus(P)were designed,and two-year old P.yunnanensis was used as the test material for foliar spraying of N and P.N,P and potassium(K)of P.yunnanensis seedlings were determined every two months,and the effects of different fertilization levels on the accumulation,distribution and structural characteristics of the nutrient elements were analyzed.[Results]Foliar spraying of N and P could promote the accumulation of N,P and K reserves of P.yunnanensis seedlings.In August,the effect of T_(8)treatment(N 0.50%,P 0.40%)was the best on the accumulation of N,P and K reserves in per plants;in October,the effect of T_(4)treatment(N 0.25%,P 0.20%)was the best on the accumulation of N,P and K reserves in per plants;in December,the effect of T_(7)treatment(N 0.50%,P 0.20%)was the best on the accumulation of P and K reserves in per plants.In different organs,the allocation of N,P and K reserves in leaves accounted for a higher proportion.From the perspective of the allocation of nutrient elements reserves,the T_(4)treatment had a better effect on the improvement of N and P reserves allocation in the aboveground part,and the T_(5)treatment(N 0.25%,P 0.40%)had a better effect on the improvement of K reserve allocation in the aboveground part.In the structural characteristics of nutrient element reserves,the application of N and P could reduce the root-crown ratio of N,P and K reserves,reduce the stem-leaf ratio of K reserves,and increase the ratio of photosynthetic organs to non-photosynthetic organs of N,P and K reserves.[Conclusion]N and P foliar spraying can promote the accumulation of nutrient element reserves in P.yunnanensis seedlings,increase the allocation of nutrient element reserves in stems and leaves,decrease the root-crown ratio.By analyzing the changes of nutrient elements,the suitable nitrogen and phosphorus application amount is screened,providing guidance for promoting the cultivation of P.yunnanensis seedlings.
作者
顾雪莎
蔡年辉
许玉兰
GU Xuesha;CAI Nianhui;XU Yulan(Key Laboratory of Ministry of Education on Forest Resources Conservation and Utilization in the Southwest Mountains of China,Southwest Forestry University,Kunming 650224,China;Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Southwest China,Southwest Forestry University,Kunming 650224,China)
出处
《云南农业大学学报(自然科学版)》
北大核心
2025年第3期152-163,共12页
Journal of Yunnan Agricultural University:Natural Science
基金
云南省农业联合专项重点项目(202401BD070001-023)
国家自然科学基金项目(31860203)
云南省研究生导师团队建设项目(2024-61)。
关键词
云南松
氮磷叶面喷施
营养元素
积累
分配
结构特征
Pinus yunnanensis
nitrogen and phosphorus foliar spraying
nutrient elements
accumulation
allocation
structural characteristics
作者简介
顾雪莎(2001-),女,四川会理人,在读本科生,主要从事林木遗传育种研究。E-mail:1533805731@qq.com;通信作者:许玉兰(1979-),女,贵州习水人,博士,教授,主要从事林木遗传育种研究。E-mail:xvyulan@163.com。
