香榧生长期叶片和种子中矿质元素动态变化研究  

Mineral elements in leaves and seeds of Torreya grandis‘Merrillii' during seed development

作　　者：刘萌萌[1] 曾燕如[1] 江建斌[1] 韩炯[1] 喻卫武[1] 

机构地区：[1]浙江农林大学亚热带森林培育国家重点实验室培育基地,浙江临安311300

出　　处：《浙江农林大学学报》2014年第5期724-729,共6页Journal of Zhejiang A&F University

基　　金：浙江省科技厅果品团队建设项目(2009R50033-7);浙江省大学生科技创新活动计划(新苗人才计划)项目(2012R412048)

摘　　要：为了探讨香榧Torreya grandis‘Merrillii’生长期叶片营养状况与果实营养状况的关系,对香榧在种子速生期和充实期叶片和种子中8种矿质元素进行动态分析。结果表明:1香榧叶片中氮、磷、钾在种子膨大初期下降幅度较大,分别为26.5%,23.1%和36.2%;种子中氮、磷的下降幅度分别为15.4%和8.3%,钾元素呈现上升趋势。2叶片中钙、锰、铜在整个实验过程中均呈现上升趋势,香榧叶片中镁元素一直呈现下降趋势;在种子中这4种元素呈现先下降后上升的趋势。3叶片中磷质量分数与种子中钙、锌和锰质量分数均存在显著的正相关关系(P<0.05),而叶片中钙质量分数与种子中磷质量分数存在极显著的负相关关系(P<0.01)。由此推断:种子进入速生期前应适当增施氮肥、磷肥和钙肥,7月中旬适当补施钾肥,种子采收后补施镁肥,并重视磷肥和微肥的配合施用,对香榧产量和质量会产生积极影响。To explore the relationship between leaf and seed nutrients of Torreya granclis ‘ Merrillii＇ , eight mineral elements （N, P, K, Ca, Mn, Cu, Mg, and Zn） were quantified. Then, analysis of their dynamic changes during fast growth and seed filling was conducted using a correlation analysis. Results at the early stage when seeds enlarged showed 1） decreases in the leaves for N （26.5%）, P （23.1%）, and K （36.2%）; decreases in the seeds for N （15.4%） and P （8.3%）; and an increase in the seeds for K. 2） In leaves, Ca, Mn, and Cu increased, but Mg decreased; whereas in the seeds at first they decreased but later increased. 3） In fruits, Ca, Zn, and Mn were significantly and positively correlated （r = 0.906, 0.924, 0.924, P〈0.05） to P in

关 键 词：经济林学 香榧 叶片 种子 矿质元素 动态变化 

分 类 号：S664.5[农业科学—果树学] S718.3[农业科学—园艺学]