Growth, Nitrogen and Phosphorus Uptake of Sorghum Plants as Affected by Green Manuring with Pea or Faba Bean Shell Pod Wastes Using 15N

Mohammed Al-Chammaa1, Farid Al-Ain1, Fawaz Kurdali1, *
1 Agriculture Department, Atomic Energy Commission of Syria, Damascus, Syria

Article Metrics

CrossRef Citations:
Total Statistics:

Full-Text HTML Views: 5749
Abstract HTML Views: 1857
PDF Downloads: 1042
ePub Downloads: 657
Total Views/Downloads: 9305
Unique Statistics:

Full-Text HTML Views: 2580
Abstract HTML Views: 924
PDF Downloads: 611
ePub Downloads: 432
Total Views/Downloads: 4547

Creative Commons License
© 2019 Al-Chammaa et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Agriculture Department, Atomic Energy Commission of Syria, Damascus, Syria; Tel: +963112132580;



During the freezing or canning preparation process of green grain leguminous, large amounts of shell pods are considered as agricultural organic wastes, which may be used as Green Manure (GM) for plant growth enhancement.


Evaluation of the effectiveness of soil amended with shell pod wastes of pea (PGM) or faba bean (FGM) as GM on growth, nitrogen and phosphorus uptake in sorghum plants.


Determination of the impact of adding four rates of nitrogen (0, 50, 100, and 150 kg N ha-1) in the form of pea (PGM) or faba bean (FGM) shell pod wastes as GM on the performance of sorghum using the indirect 15N isotopic dilution technique.


Sorghum plants responded positively and differently to the soil amendments with either GMs used, particularly, the PGM. In comparison with the control (N0), soil amendment with an equivalent rate of 3.5 t ha-1 of PGM (PGM100) or with 6.5 t ha-1 of FGM (FGM150) almost doubled dry weight, N and P uptake in different plant parts of sorghum. Regardless of the GM used, estimated values of %Ndfgm in sorghum plants ranged from 35% to 55% indicating that the use of pod shells as GM provided substantial portions and amounts of N requirements for sorghum. Moreover, nitrogen recoveries of added GM (%NUEgm) ranged from 29 to 45% indicating that N in both of GM forms were used effectively. Accordingly, equivalent amounts to 17 - 48 kg N ha-1 of inorganic fertilizer may be saved. The beneficial effect of incorporating pod shells in soil on sorghum N was mainly attributed to their N availability, besides to their effects on the improvement of soil N uptake, particularly when using PGM.


The agricultural by-products of faba bean and pea pod shells could be used as GM for sorghum growth improvement by enhancing N and P uptake from soil and from the organic source.

Keywords: By-products, Green manure, Leguminous pod shells, 15N, Sorghum, PGM, FGM.