RESPONSE OF POTATO PLANTS GROWN IN CLAY SOIL TO ANHYDROUS AMMONIA RATES AND FOLIAR APPLICATION OF ZN AND MN

Document Type : Research articles.

Author

Soils, Water and Environ. Res. Inst., Agric. Res. Centre, Giza, Egypt.

Abstract

Two Field experiments on potato (Solanum tuberosum, L. cv.
Diamont) crop were carried out at El-Qanater Horticultural Research
Station, Kalubiya, Governorate, Egypt located at lat. 30.11, long 31.60
and 14.00 m above the mean sea level during two successive seasons
2010 and 2011. The study concerned the use of different rates of
anhydrous ammonia (100 and 120 kg N/fed.) with foliar application of
zinc and manganese or both on potato crop in alluvial soil. Generally,
in most cases,
The high anhydrous ammonia level (120 kg N/ fed.) was
increased significantly dry matter of potato plant at 90 days from
planting and nitrogen & phosphorus content as well as dry weight of
tuber/ plant (g/plant), fresh & dry tuber yield/fed., N, P, K, Zn and Mn
contents of tuber compared to low anhydrous ammonia level (100 kg
N/ fed.) of both seasons.
Generally, the most parameters in this investigation were
increased significantly when the treatment of foliar application with
mixture of Zn and Mn was carried out in both seasons. In contrast, the
lowest ones were recorded by the control treatment (without foliar
spray) followed by sole foliar spray with Zn or Mn in two seasons.
Finally, the best significant values of most parameters were
obtained by interaction between foliar application with mixture of Zn
and Mn under the high anhydrous ammonia level (120 kg N/ fed.).
Meanwhile, the lowest ones were observed when control treatment
(without foliar spray) with the low anhydrous ammonia level (100 kg
N/ fed.) was practiced of both seasons.

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