施氮量对幼龄胡椒根系生长及抽穗的影响
为探讨氮素营养对胡椒根系生长及花穗抽生的影响袁 以胡椒热引 1 号插条苗为试验材料袁 采用盆栽试
验的方法袁 研究施氮量 0, 1, 2, 3 4 g/盆共 5 个处理对胡椒叶片 SPAD 值, 干物质积累量尧 根系生长及花穗抽
生情况的影响遥 结果表明院 适量施氮可以增加胡椒叶片 SPAD 值和干物质累积袁 促进根系生长袁 总根长尧 总表
面积尧 单位土壤体积的总根长尧 根体积均增加袁 花穗抽生较早且数量较多遥 但过量施氮会引起胡椒叶片 SPAD
值的降低袁 抑制干物质累积和根系生长发育袁 花穗抽生较晚袁 花穗数较少遥 因此袁 在本实验条件下袁 胡椒插条
苗的适宜施氮量为 1耀2 g/盆遥
Abstract
In order to evaluate the nitrogen N rate on root growth and heading of pepper, the experiment was
conducted with five N treatments in pots. The five N treatments named N1, N2, N3, N4 and N5 were 0, 1, 2, 3
and 4 g N per pot, respectively. The results showed that appropriate N rate increased SPAD reading, dry matter,
root growth, and flower of pepper. Length, surface area, length per volume, and volume of pepper root increased
in appropriate N rate. Appropriate N rate promoted early flowering and more flower spike of pepper. However, excessive N rate reduced SPAD reading, dry matter, root growth, and flower of pepper. Length, surface area, length per volume, and volume of pepper root decreased in excessive N rate. And excessive N rate delayed flowering and reduced the flower spike. Therefore, the appropriate N rate is 1 to 2 g per pot of pepper in this container experiment.
Key words
nitrogen rate /pepper /root growth /flower spike{{custom_keyword}} /
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鱼 欢 邢诒彰 祖 超 王 灿 李志刚 杨建峰 邬华松.施氮量对幼龄胡椒根系生长及抽穗的影响[J]. 热带作物学报, 2017, 38(1): 19-23
YU Huan , XING Yizhang ZU Chao WANG Can LI Zhigang YANG Jianfeng , WU Huasong .Nitrogen Rate on Root Growth and Heading of Pepper[J]. Chinese Journal of Tropical Crops, 2017, 38(1): 19-23
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