摘要
对几个高产新品种橡胶树不同物候期叶片大量元素含量进行研究。结果表明,在一个完整的物候期内,热研8-79的氮、磷、钾,及热研7-33-97的氮极显著高于PR107;热研8-79的镁极显著低于热垦525,显著低于RRIM600;总体变化趋势,氮、磷相似,萌动期到淡绿期逐渐降低,淡绿期到老化期逐渐升高;钾从萌动期到淡绿期逐渐下降,淡绿期到稳定期逐渐升高,稳定期到老化期逐渐下降;钙的变化趋势和钾相反;镁的变化没有规律可循;元素含量都是氮>钾>钙>镁、磷。不同品种橡胶树在同一个物候期内,大量元素的相对变化率钾、钙、镁较大,氮、磷较小。
The macro-element contents in leaves of several new high-yield varieties of Hevea brasilensis at different phenophases are studied. The results indicated that during a whole phenophase, the contents of nitrogen, phosphorus, potassium in the leaves of SCATCS-79 and nitrogen of SCATC7-33-97 were significantly higher than that of PR107; magnesium content of REYAN 8-79 was significantly lower than those of REKEN525 and RRIM600. As far as overall changing trend was concerned, nitrogen was similar to phosphorus, which decreasing gradually from sprout stage to grey green, then increasing from grey green to senescent stages. Potassium decreased from sprout stage to grey green, then increased from grey green to stable stage, and then decreased from stable stage to senescent stage. The changing trend of calcium was contrary to that of potassium. The nutrition contents sequence was N〉K〉Ca〉Mg and P. The relative changing rates of potassium, calcium, magnesium were fast, and those of nitrogen, phosphorus were low in the same phenophases of the different varieties of Hevea brasilensis.
出处
《土壤通报》
CAS
CSCD
北大核心
2009年第5期1127-1130,共4页
Chinese Journal of Soil Science
基金
重大基础研究前专项(2004CCA00400)
农业部热带作物栽培生理学重点开放实验室开放课题(KLOF0609)资助
关键词
新品种橡胶树
物候期
大量元素
养分含量
New varieties of Hevea brasilensis
Phenophases
Macro-element
Nutrient content
