摘要
以贵烟4号烤烟品种为材料,研究了不同氮肥用量对烟株干物质及氮磷钾素累积的影响。结果表明,在本试验每667 m^2施纯氮0-8.5 kg范围内,随作施氮量的增加,各生育时期烟株干物质量及氮、磷、钾素累积量都显著提高,但在较高施氮量（4-8.5 kg）范围内,氮肥用量的增加对烟株干物质和氮、磷、钾的累积量没有产生明显的促进作用。说明增施氮肥有利于烟株生长和对氮、磷、钾的吸收和累积,而每667 m^2纯氮用量超过4 kg后,烟株干物质和氮、磷、钾积累量对氮肥用量的反应遵循报酬递减规律。
Guiyan 4, a tobacco cultivar, was employed to investigated the effect of nitrogen（N） application amount on the dry matter and N, phosphorus （P） or potassium （K） accumulation in the present research. The results showed that within the application range of 0 -8.5 kg · 667 m^2, the dry matter, as well as N, P, or K accumulation of tobacco plants for all stages were obviously increased along with the increase in N application. When the range was 4 - 8.5 kg · 667 m^2, however, no synchronous increase in accumulation of these parameters were obtained. The results indicated that to certain extent, the increase in N application may have a positive effect on the growth of tobacco, as well as its P, and K accumulation.
出处
《山地农业生物学报》
2009年第2期95-98,共4页
Journal of Mountain Agriculture and Biology
基金
贵州省"十一五"重大专项基金资助[(2006)6026]
关键词
贵烟4号
施氮量
干物质
氮磷钾
Guiyan 4
Nitrogen applicotion amount
Dry matter
N, P, K
