Phosphorus use Efficiency of Safflower (Carthamus tinctorius L.) and Sunflower (Helianthus annuus L.)

被引:10
作者
Abbadi, Jehad [1 ,2 ]
Gerendas, Joska [2 ]
机构
[1] Al Quds Univ, Coll Sci & Technol, Dept Biol, Jerusalem, Israel
[2] Univ Kiel, Inst Plant Nutr & Soil Sci, Kiel, Germany
关键词
Helianthus annuus; phosphorous; Carthamus tinctorius; nutrient utilization efficiency; yield response curve; YIELD COMPONENTS; PHOSPHATE CONCENTRATION; NUTRIENT EFFICIENCY; GENOTYPIC VARIATION; ACID-PHOSPHATASE; SOLUTION CULTURE; NITROGEN USE; GROWTH; PLANTS; TOLERANCE;
D O I
10.1080/01904167.2014.983115
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
This study comparatively evaluates phosphorus (P) use efficiency of safflower and sunflower in view of identifying low input oil crops. Sunflower accumulated more P than safflower at all equivalent P supplies. Sunflower was more efficient at their best P supplies to utilize absorbed P than safflower in terms of efficiency ratio and utilization index. Yield response curves interpreting the functional relationship between nutrient supply and yield using Michaelis-Menten equation indicate that sunflower is less sensitive to inadequate P supply and thus more P-efficient than safflower with respect to yield, as the term 'Km' is lower for sunflower. The minimal P amount per pot required to trigger yield formation (term 'Cmin') was lower in sunflower than safflower. Harvest Index in sunflower out-yielded that of safflower at all P supplies. Critical deficiency contents of sunflower were lower than that for safflower. It can be concluded that safflower cannot be considered as low-input crop.
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页码:1121 / 1142
页数:22
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