EFFECT OF INTEGRATED INORGANIC AND ORGANIC NITROGEN FERTILIZER ON QUANTITY AND QUALITY OF POTATOES PLANT GROWN ON NEW RECLAIMED SANDY SOIL.

Shahein, M. M.; Husein, M. E.; Ahmed, Azza R.; Shaker, Nesreen A.

doi:10.21608/jssae.2014.49766

EFFECT OF INTEGRATED INORGANIC AND ORGANIC NITROGEN FERTILIZER ON QUANTITY AND QUALITY OF POTATOES PLANT GROWN ON NEW RECLAIMED SANDY SOIL.

Document Type : Original Article

Authors

¹ Cairo University- Faculty of Agriculture-Department of Vegetable Crops.

² Cairo University- Faculty of Agriculture-Department of soil and water.

³ Agriculture Research Center – Soil, Water and Environment Institute-Dep. of improvement and Conservation of soil.

10.21608/jssae.2014.49766

Abstract

The integrated use of organic and inorganic fertilizers on the yield of potatoes was evaluated in a field experiment at newly reclaimed sandy soil at El-Kattaba Region El-Monofia Governorate-Egypt, during two successive years (growing seasons of winter 2011/2012 and 2012/2013). The organic sources used were farmyard manure, poultry manure and compost. These were integrated in different proportions with mineral nitrogenous fertilizer as ammonium nitrate to supply 120 kg Nfed^-1 N. All the organic fertilizers were applied at planting time and mineral fertilizer (ammonium nitrate) was applied as divided into 4 doses, the 1^st dose was added after planting by 15 days and the other doses applied every 15 days. The results showed that integrated use in different proportion increased the plant height, number of stems, total chlorophyll, nitrogen concentration in potato tubers and protein content, but mineral nitrogen fertilizer individually gave higher values compared with the integrated organic and mineral nitrogen fertilizers. However, the maximum and minimum values of potato yield and nitrate content in potato tuber were obtained by application of poultry manure combined with mineral nitrogen fertilizer and organic nitrogen individually, respectively.Organic matter OF content in soil was increased in all treatments compared with sole mineral nitrogen fertilizer and contrary, the values of bulk density BD decreased generally. Therefore,the combined use of organic manure with inorganic fertilizer application was recognized as the most suitable way for ensuring high quantity and quality crop yield and reducing the harmful effects of using nitrogenous chemical fertilizers, but also for sustaining soil fertility status.

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