Document Type : Research Paper
Authors
1
Department of Plant production and Genetics, Faculty of Agriculture, university of maragheh
2
MSc student of Agroecology, Department of Plant Production and Genetics, Faculty of Agriculture, University of Maragheh, Maragheh, Iran
3
Assis. Prof., Department of Plant Production and Genetics, Faculty of Agriculture, University of Maragheh, Maragheh, Iran
4
Assoc. Prof., Department of Plant Production and Genetics, Faculty of Agriculture, University of Maragheh, Maragheh, Iran.
10.22034/saps.2024.58561.3120
Abstract
A field experiment was carried out as a split plot based on a randomized complete block design (RCBD) with 18 treatments and three replications at the faculty of Agriculture, University of Maragheh, Iran, in 2022 growing seasons. The main factor including without irrigation (rainfed conditions), one and two series of irrigation. Also, the sub-factor was four fertilizer sources including non-application of fertilizer (control), arbascular mycorrhizal fungi (AMF), humic acid and AMF+humic acid.
Results
The results demonstrated that the highest biological yield , seed yield and forage yield of grass pea were obtained in two supplementary irrigation with integrative application of AMF+ humic acid. The forage yield of grass pea was enhanced by 16 and 35.7% after one and two supplementary irrigation. Additionally, application of AMF, humic acid and AMF+ humic acid enhanced the forage yield of grasspea by 16.9, 7.6 and 25.6%, respectively, when compared with control (non-application of fertilizer). The maximum content of acid detergent fiber and neutral detergent fiber was obtained in rainfed conditions without fertilizer application. Moreover, the maximum content of crude protein , ash , water soluble carbohydrate , total digestible nutrients , digestible dry matter , relative feed value and net energy for lactation was achieved in two supplementary irrigation with integrative application of AMF+ humic acid.
Conclusion
Generally, the results of the study showed that implementation of supplementary irrigation following application of AMF+humic acid known as one on the sustainable methods for improving forage quantity and quality of grass pea under rainfed conditions.
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