RESPONSE GROWTH AND PRODUCTIVITY OF SNAP BEAN (PHASEOLUS VULGARIS L.) PLANTS TO ORGANIC MANURE FERTILIZATION, IRRIGATION REGIMES AND FOLIAR SPRAYING WITH ASCORBIC ACID UNDER NEWLY RECLAIMED SOIL CONDITION

Abstract

Two field experiments were carried out in private farm at Bani Mazar region, Al-Minia Governorate, Egypt, during the two fall seasons of 2015 and 2016 under drip irrigation system, in sandy soil. The objectives of this experiment were to study the effect of three factors i.e. cattle manure fertilization at three rates (20, 30 and 40 m3/ fed.), water regimes at three levels (100, 80 or 60 %) from snap bean plant irrigation requirements /fed. and foliar spray with ascorbic acid at two concentrations (100 and 200 mg/ L)beside the control and their interactions on growth, productivity, water use efficiency (Kg yield/ m3 water) as well as some chemical composition in leaves and green pods of snap bean plants. The experimental design was split-split–plot, the treatments were designated in sub-sub-plot i.e. cattle manure rates in the main plots, water regimes in the sub plots, while foliar spray with ascorbic acid arranged in the sub-sub-plot. Seeds of snap bean Bronco cv. were sown in the 2nd week of September during the two seasons. The obtained results of the single treatments showed that, addingthe degradation of cattle manure at rate of 30 m3/ fed. followed with rate of 40 then 20 m3/ fed., irrigated snap bean plants with 100 % from snap bean plants irrigation requirements /fed. compared with 80 % to 60% /fed. as well as foliar spraying with the aqueous solution of ascorbic acid especially at the highest rate of 200 mg/ L as compared with the moderate rate one (100 mg/ L) or the control treatment, markedly increased all studied parameters of vegetative growth organs, pods characters, total pod yield and its components. Moreover, the same mentioned single treatments showed obvious increment of the chemical composition in the leaves and the green pods. The lowest value of the fiber contents (%) in the pods was obtained by adding the middle amount of cattle manure, full irrigation and the highest rate of ascorbic acid (200 mg/ L). The highest water use efficiency was obtained by adding the middle amount of cattle manure,irrigation with 60 % from snap bean plants irrigation requirements /fed. and the highest rate of foliar spraying with ascorbic acid, followed with 80 % and 100 /fed. Increasing water deficient from 80 % to 60 % /fed. significantly decreasing all the measurements, increasing the non-marketable yield (ton/fed.) and fiber contents % in pods. Also, proline content % in snap bean leaves achieved increases up to irrigated plants with the middle water regime treatment only followed with 100 % (control) but the highest severe water stress (60 % /fed.) tended to decrease proline content %. Concerning to the results of the interactions among the three factors used in this study, it can be said that, the treatments led to significant increases in most of the studied characters, the best interaction treatment which led to obtain the highest means values over all the other treatments was adding cattle manure at 30 m3/fed., irrigation schedule regime at 80 % from snap bean plants irrigation requirements/ fed. and foliar spraying with ascorbic acid at the highest rate of 200 mg/ L which increased the vegetative growth, marketable, total yield (ton/ fed.) and its components. In spite of increasing water use efficiency to the highest level with the interaction among cattle manure at 30 m3/fed., irrigation regime at 60 %/ fed. and foliar spraying with ascorbic acid at the highest rate of 200 mg/ L. In addition, on the previous interaction was the favorite interaction to gain the highest marketable, total and the lowest weight of non-marketable yield as well as it is can save 20 % from irrigation requirements of snap bean plants/ fed. grown under the newly reclaimed of sandy loam soil conditions, also, increasing nutritive values i.e. carbohydrates, protein and decreasing the fiber contents % in the pods as compared with the other rest interactions. On the contrary, the interaction of adding the cattle manure at 20 m3 /fed. with irrigation regime at 60 % /fed. and foliar spraying with ascorbic acid at rate of 100 mg/ L produced the lowest characters, these findings were true in the both fall seasons.