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Chaudhary Charan Singh Haryana Agricultural University, Hisar

Chaudhary Charan Singh Haryana Agricultural University popularly known as HAU, is one of Asia's biggest agricultural universities, located at Hisar in the Indian state of Haryana. It is named after India's seventh Prime Minister, Chaudhary Charan Singh. It is a leader in agricultural research in India and contributed significantly to Green Revolution and White Revolution in India in the 1960s and 70s. It has a very large campus and has several research centres throughout the state. It won the Indian Council of Agricultural Research's Award for the Best Institute in 1997. HAU was initially a campus of Punjab Agricultural University, Ludhiana. After the formation of Haryana in 1966, it became an autonomous institution on February 2, 1970 through a Presidential Ordinance, later ratified as Haryana and Punjab Agricultural Universities Act, 1970, passed by the Lok Sabha on March 29, 1970. A. L. Fletcher, the first Vice-Chancellor of the university, was instrumental in its initial growth.

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Subject: Plant Physiology × Author: Dharamvir × End date: 2015 × Start date: 2010 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Role of salinity in tree mortality in southwest Haryana conditions
    (CCSHAU, 2012) Dharamvir; Angrish, Rajiv
    This investigation was conducted to find out the effect of native soil salinity on Dalbergia sissoo and Acacia nilotica growing under field conditions. For each tree 20 nonsaline (ECe < 4 dS m-1) and 20 saline (ECe > 8 dS m-1) sites were earmarked in Hisar district. About 7-8 months old leaves were sampled and proceeded for analysis of various morphological and physiological traits. It was observed that the leaf area of Dalbergia sissoo showed a decrease of 11.3 % and Acacia nilotica showed a decrease of 9.81 % under saline conditions as compared to the non-saline conditions. An increase in the specific leaf weight and total soluble solids was observed in both the tree species under saline conditions. Salinity also caused membrane injury in both the species under saline conditions as determined by the increased relative stress injury index. The trees growing under saline conditions also had a lower water status as depicted by the relative water content % at the saline sites. Likewise the chlorophyll content also depicted a decline at the saline sites. Interestingly ,however, total sugars in both Dalbergia sissoo and Acacia nilotica showed that increase in response to salinity at saline sites. Both the tree species showed a many fold increase in leaf sodium content. However the leaf potassium content decreased with a concomitant increase in the Na:K ratio. A many fold increase in the leaf chloride and sulphate content of both the species was also observed. It is concluded that the saline site trees of Dalbergia sissoo and Acacia nilotica show growth inhibition as evidenced by decreased leaf area. The tree species appear to cope up with the saline stress by osmoregulation due to increased osmolites like sugars. However disturbed ionic balance due to many fold increase in sodium, chloride and sulphate inhibits growth over a period of time and results in the tree decline and ultimate mortality.