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Dera Ghazi Khan, Pakistan

Ali A.,The Ghazi University | Haq T.U.,The Ghazi University | Mahmood R.,University of Punjab | Jaan M.,The Ghazi University | Abbas M.N.,The Ghazi University
Silicon | Year: 2016

Purpose: Salt stress poses a threat to wheat performance that can be managed by silicon application. Therefore, the current short term experiment was aimed to learn the effect of silicon on the defense system, ionic composition and growth of wheat in the presence and absence of salt stress. Methods: In the current experiment, the influence of silicon (6 mM) on anti-oxidative potential and dry matter yield of wheat genotypes (salt sensitive; Fareed-06 and salt tolerant; Inqlab-91) was studied under saline (10 dS/m) and control (2 dS/m) hydroponic solutions. The whole Si was applied to the pots of the Si+ treatment (6 mM) using calcium silicate solution. CaCl2 solution was applied to the pots of the Si-deficient treatment to balance the same total of Ca as in the Si+ treatment to obtain the sole effect of Si. Various ionic, biochemical and growth parameters of wheat plants were recorded after 34 days of transplanting according to standard procedures. Results: Silicon addition to the hydroponic solution increased wheat seedling weight, K:Na with limited Na and enhanced K uptake. Moreover, Si increased chlorophyll chl a/b ratio and promoted the actions of superoxide dismutase (SOD) and catalase (CAT). Conclusions: It can be concluded that silicon supplementation improved the wheat growth and plant defense suppressed by the salt applied. Further, salt tolerant variety gave better performance than the salt sensitive variety. © 2016 Springer Science+Business Media Dordrecht

Malik M.A.,The Ghazi University | Nadeem S.M.,University of Agriculture at Faisalabad | Ibrahim M.,The Ghazi University | Hussain S.,The Ghazi University
Soil and Environment | Year: 2015

Due to water scarcity, the use of underground brackish water in an efficient way is a dire need to improve soil conditions as well as crop growth. To obtain this objective, a field study was conducted to evaluate the efficacy of organic amendments (compost, farm yard manure and poultry manure) alone and in combination to mitigate the negative impact of poor quality water on chickpea (Cicer arietinum) growth and soil properties. Soil samples were collected before organic amendments application and also after crop harvesting. At flowering, plants were uprooted from each plot for collecting nodulation data whereas data regarding growth and yield components of chickpea was recorded at maturity. The results showed that application of organic fertilizers not only caused significant effect on growth and yield components of chickpea but also improved physico-chemical properties of soil by mitigating the negative impact of brackish water. Soil electrical conductivity, sodium adsorption ratio was significantly low and nitrogen, phosphorus and organic matter contents were higher in organic amendments treated soil. Organic manures also differed significantly regarding their effect and better results were obtained where farmyard manure was applied alone or in combination with poultry manure and compost. The results indicate that application of organic manure could be a better strategy to alleviate the negative impact of brackish water on crop and soil. © 2015, Soil Science Society of Pakistan.

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