Using Humic Substances and Foliar Spray with Moringa Leaf Extract to Alleviate Salinity Stress on Wheat

  • Abdel-Rahman M. A. MerwadEmail author
Part of the The Handbook of Environmental Chemistry book series (HEC, volume 77)


Worldwide, particularly in dry regions, soil salinity is one of the most important problems limiting plant growth and productivity of a wide range of horticulture and field crops. The adverse effect of salinity on plants may lead to disturbances in plant metabolism, which consequently lead to a reduction of the plant growth and productivity. The aim of this work was to investigate the effect of humic substance with or without foliar spraying Moringa leaf extract (MLE) on wheat yield, photosynthetic pigments, nutrient uptake, and soil characteristics available N, P, and K in saline soil conditions. Results indicated that photosynthetic pigments, nutrient uptake, and available N, P, and K significantly decreased within each humic substance application and MLE with increasing salinity concentration. Under saline conditions, either humic materials or MLE increased growth, plant height and yield parameters (i.e., straw and grains yield, biological yield, weight of 1,000 grain), protein content of the leaf, harvest index, photosynthetic pigments, and proline and NPK-uptake of wheat plants compared to those in the untreated control plants. The highest values of biomass yield, the weight of 1,000 grain, chlorophyll, chlorophyll b, carotenoid concentrations, and NPK-uptake under different salinity levels were observed with application of HA and FA under spraying MLE. Soil pH and EC were decreased with the application of humus materials under soil salinity level. In contrast, organic matter and available nutrients (i.e., N, P, and K) were increased in soils treated with humic materials compared to those in untreated ones.


Humus materials Moringa leaf extract Salinity stress Soil properties Wheat 


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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.Soil Science Department, Faculty of AgricultureZagazig UniversityZagazigEgypt

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