摘要
为探讨氮素营养对胡椒根系生长及花穗抽生的影响,以胡椒热引1号插条苗为试验材料,采用盆栽试验的方法,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、根系生长及花穗抽生情况的影响。结果表明:适量施氮可以增加胡椒叶片SPAD值和干物质累积,促进根系生长,总根长、总表面积、单位土壤体积的总根长、根体积均增加,花穗抽生较早且数量较多。但过量施氮会引起胡椒叶片SPAD值的降低,抑制干物质累积和根系生长发育,花穗抽生较晚,花穗数较少。因此,在本实验条件下,胡椒插条苗的适宜施氮量为1~2 g/盆。
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 SPA D 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.
出处
《热带作物学报》
CSCD
北大核心
2017年第1期19-23,共5页
Chinese Journal of Tropical Crops
基金
国家自然科学基金(No.31401940)
关键词
施氮量
胡椒
根系生长
花穗抽生
nitrogen rate
pepper
root growth
flower spike
