Agrometeorological indices of white clover (Trifolium repens) in western Himalayas

被引：0
作者：
Kumar, Rakesh [1 ]
Kaundal, Munish [1 ]
Vats, S. K. [2 ]
Kumar, Sanjay [3 ]
机构：
[1] CSIR Inst Himalayan Bioresource Technol, Nat Plant Prod Div, Palampur 176061, Himachal Prades, India
[2] CSIR Inst Himalayan Bioresource Technol, Biodivers Div, Palampur 176061, Himachal Prades, India
[3] CSIR Inst Himalayan Bioresource Technol, Div Biotechnol, Palampur 176061, Himachal Prades, India
来源：
JOURNAL OF AGROMETEOROLOGY | 2012年 / 14卷 / 02期
关键词：
White clover; phenophases; heat units; heliothermal unit; photothermal unit; WHEAT TRITICUM-AESTIVUM; YIELD; TEMPERATURE; PHENOLOGY; CROP;
D O I：
暂无
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
Field experiments were conducted during 2009-2010 and 2010-2011 to study the growth performance of white clover (Trifolium repens L.) under different temperature regimes over the crop growth period. The agroclimatic indices for temperature viz., growing degree days (GDD), heliothermal units (HTU) and photothermal units (PTU) were computed for different phenological stages of the crop. Changes in weather parameters concomitant to different sowing time caused significant variation in the performance of the crop. The results indicated that the early sown crop had longer crop span (205 days) than the late sown (142 days). From emergence to seed maturity, white clover accumulated GDD of 2314 +/- 72 degrees C days, HTU of 17791 +/- 409 degrees C days hour and PTU of 29412 +/- 742 degrees C days hour, respectively. Positive correlations were found between fresh leaf weight, fresh stem weight and fresh root weight for GDD, HTU and PTU.
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页码：138 / 142
页数：5
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