Effect of organic, mineral and bio-nitrogen fertilization on growth and productivity of some snap bean cultivars grown in clay soil

الملخص EN

This work was carried out during the two successive summer seasons of ٢٠١٦ and ٢٠١٧ in a Private Farm, Dondet Village, Meet Ghamr District, Dakhlia Governorate, Egypt to study the effect of various sources of nitrogen fertilization which equal ٦٠ kg N/fad., on growth, yield and pod quality of snap bean cultivars (Paulista and Bronco) grown in clay soil under flood irrigation.

The results showed that, fertilizing Paulista cultivar with ٣٠ kg N as organic nitrogen (ON) + ٣٠ kg N as MN/fad., (ammonium sulphate) + Nr (nitrobein) increased dry weight of leaves, branches and shoot dry weight/ plant, chlorophyll a, b, total (a+b) in leaves tissues, total yield/fad., and average number of pods/ plant as well as total carbohydrates and total protein in green pods in both seasons.

Whereas, the interaction between fertilizing of Bronco cultivar with ٢٠ kg N as ON+٤٠ kg N as MN/fad.,+Nr increased average pod weight and total fibers in green pods in both seasons.