Document Type : Research Paper
Authors
1
Department of Agronomy, Faculty of Agriculture, University of Zabol, Zabol, Iran
2
Department of Agronomy,Faculty of Agriculture,University of Zabol,Zabol,Iran
3
Department of Agronomy , Faculty of Agriculture, Zabol University, Iran
4
Instructor of Sistan Agricultural and Natural Resources Research Center
10.22034/saps.2025.63583.3281
Abstract
Water shortage is one of the most important limiting environmental factors in the production of agricultural products. Using natural fertilizers can make optimal use of water in irrigation.
The current research was conducted in order to investigate the effect of different levels of drought stress and humic acid foliar application on fodder quality of black bean experimentally in the form of a split plot in the form of a complete block design at Zahk Agricultural Research Station. The main factor of three levels of drought stress in growth stages including the first stage (control without applying stress), the second stage (irrigation from planting to flowering), the third stage (irrigation from flowering to harvest) and the secondary factor including foliar spraying of four levels of humic acid (0 , 1, 2 and 3 per thousand). The measured traits include forage yield, dry yield, dry matter, crude protein, cell wall (NDF), cell wall without hemicellulose (ADF), lignin, crude fat, crude fiber and crude energy.
The results showed that the interaction effect of experimental treatments is significant for crude protein and crude fiber traits. Drought stress decreased the yield of fresh forage, dry matter, dry matter, digestible wood matter and raw energy. . In this research, the highest yield of fresh fodder (4046 kg/ha) and dry fodder (2763 kg/ha) is related to the absence of drought stress, and the highest yield of fresh fodder (3681 kg/ha) and dry fodder (2503 kg/ha) is related to the surface Three per thousand was humic acid.
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