摘要
对3个品种巴西橡胶树实生苗进行低NPK胁迫处理并比较分析了部分农艺性状的变化情况。结果表明:(1)低N胁迫可显著或极显著阻碍株高、茎粗、叶蓬距、叶面积的增长;低P胁迫可显著或极显著影响株高和茎粗的增大,会极显著影响PR107叶面积扩大;低K胁迫对RRIM600实生苗株高生长、对GT1和RRIM600实生苗茎粗的增大、对PR107叶面积扩大也会产生显著或极显著影响。(2)RRIM600对低NPK胁迫较为敏感,胁迫后第1蓬叶的茎粗和叶面积就表现出极显著差异,PR107次之,GT1较不敏感,胁迫处理后第2或第3蓬叶才表现出显著或极显著差异。(3)橡胶树实生苗农艺性状指标中,对低NPK胁迫响应最快的是茎粗和叶面积,在胁迫处理后新生第1蓬叶就表现出显著差异,其次是株高,最慢的是叶蓬距。
Hevea brasiliensis seedlings of three varieties were treated with low NPK stress and the change of its agronomic traits were analyzed. The results showed that： （1）low N stress could significantly or very significantly impede the growth of plant height, stem diameter, distance between leaf-umbrella and leaf area; low-P stress would significantly or very significantly obstruct on increment of plant height and stem diameter, leaf area expansion of PR107 ; low-K stress significantly or very significantly holdbaek on development of plant height of GT1 seedling, stem diameter of GT1 and RRIM600 seedlings, and leaf area of PR107 seedlings. （2） To low NPK stress, RRIM600 was more sensitive to stress, that the significant difference on the stem diameter and leaf area were observed at the first new leaf-umbrella, PR107 next, and GT1 was less sensitive to stress that demonstrated significant or extremely significant difference at the second or third new leaf-umbrella. （3） Under the low NPK stress the responding time of each agronomic trait of rubber tree seedling was different, stem diameter and leaf area responded quickly, the significant differences were shown at the first new leaf-umbrella, followed by plant height, and the distance between leaf-umbrella slowly.
出处
《中国农学通报》
CSCD
北大核心
2010年第5期299-303,共5页
Chinese Agricultural Science Bulletin
基金
海南省重点科技项目"橡胶树优良砧木无性系研发"
橡胶所基本科研业务费专项
农业部农业行业科技专项"橡胶树高产
高效
安全栽培原理与技术创新
集成与示范"(3-14)
关键词
橡胶树
实生苗
低NPK胁迫
农艺性状
Hevea brasiliensi
seedling
low NPK stress
agronomic trait
