אסיף מאגר המחקר החקלאי

Effects of N and P nutrition on spike development in spring wheat

Year:

1990

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Volume :

124

Co-Authors:

Nerson, H., Agricultural Research Organization, Neve Ya'ar Experimental Station, Israel
Edelstein, M., Agricultural Research Organization, Neve Ya'ar Experimental Station, Israel
Pinthus, M.J., Faculty of Agriculture, The Hebrew University of Jerusalem, Rehovot, Israel

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Abstract:

The effects of N and P on the number of spikelets of spring wheat (Triticum aestivum L.), grown in nutrient solution, were studied under 8 h and 16 h photoperiods. The effect of P was apparent only at a high rate of N supply and the effects of N were increased significantly at a high rate of P supply. Increasing N supply increased the number of spikelets due to a promotion of the rate of spikelet initiation. It also increased the leaf-blade area and the dry matter weight of the plants at the stage of terminal spikelet initiation. These effects of N were much greater under the short photoperiod than under the long photoperiod. The practical significance of these findings for winter-grown wheat in temperate regions is pointed out. © 1990 Kluwer Academic Publishers.

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