| 赵雪岭 , 朱万昌 , 刘昕哲 , 王立中 ( 大兴安岭林业科学研究所 , 黑龙江大兴安岭 165000 )
摘要 : 通过 3a 对樟子松 1 年生苗木的营养积累过程的研究表明 :1 年生樟子松苗在生长期内 , 干物质的积累和 对 N 、 P 、 K 的吸收利用是以叶为中心 , 到生长中、后期 , 根、茎、叶中的干物质积累和对三元素的吸收积累速率明显加快。而在不同生长时期对三元素的吸收利用比例也不同 , 生长前期表现为 N>P>K, 生长中后期表现为 K>N>P, 生长后期表现为 P>N>K 。
关键词 : 樟子松苗 ; 干物质 ; 营养元素
中图分类号 :S791.253 文献标识码 :A
STUDY ON NUTRIENT ACCUMULATION PROCESS
OF ANNUAL SEEDLINGS OF P.SYLVESTRIS VAR.MONGOLICA
ZHAO Xue-ling,ZHU Wan-chang,LIU Xin-zhe,WHVG WANG Li-zhong (Daxing'adling Forestry Research Institute,Daxing'adling 165 000,Heilongjiang,China)
Abstract:Study on nutrient accumulation process of annual seedlings of P.sylvstris var ,mongolica showed that in growing phase of the seedling,leaves played a leading role in dry matter accumulation and absorbing for N,P,K.In the medium and later phases of growth the speed of accumulation of dry matter and absorbing for the three elements quickened obviously. the order of absorbing was N>P>k in the early phase,K 〉 N 〉 P in the mediam phase and P 〉 N 〉 k in the later phase.
Key words :Pinus sylvestris var.mongolica ;dry matter;nutrient element |
