EFFECTS OF DIFFERENT SOWING DATES ON THE PHENOLOGY AND ACCUMULATED HEAT UNITS IN THREE RAPESEED (BRASSICA CAMPESTRIS L.) VARIETIES

被引:0
|
作者
Akhter, Mst Towhida [1 ]
Mannan, M. A. [1 ]
Kundu, P. B. [1 ]
Paul, N. K. [1 ]
机构
[1] Rajshahi Univ, Dept Bot, Rajshahi 6205, Bangladesh
来源
BANGLADESH JOURNAL OF BOTANY | 2015年 / 44卷 / 01期
关键词
Phenology; Growing degree days; Heat use efficiency; Pheno-thermal index; WHEAT; TEMPERATURE;
D O I
暂无
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
A field experiment was carried out to study the effect of sowing dates on phenology and accumulated heat units of rapeseed (Brassica campestris L.). Seeds of three varieties (BARI Sarisha-14, BINA Sarisha-5 and BINA Sarisha-6) were sown on four different dates from October to December (S-1-18 October, S-2-2 November, S-3-17 November and S-4-3 December). The results indicated that the number of days required to attain different phenological stages decreased with delay in 'sowing. For all the phenological stages, S-1 required higher heat units than that of other sowings. The plants of SI used heat more efficiently than S-2, S-3 and S-4. At the earlier phenological stages, phenothermal index decreased with delay in sowing, but increased at the later stages.
引用
收藏
页码:97 / 101
页数:5
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