Abstract :
Dalbergia sissoo is one of the most important timber species of north India and also known as strong biological nitrogen fixer through its root nodules. Its growth and development is highly influenced by the availability of water. Therefore, an attempt was made to study the effects of different watering schedules i.e. daily, weekly, fortnightly and monthly on the growth, biomass production, and nitrate reductase (NR) activity in leaves under pot culture condition. The experiment was conducted during the month of May and
the response of four different watering schedules i.e. daily, weekly, fortnightly and monthly in twenty elite clones of Dalbergia sissoo collected from Uttar Pradesh, Haryana, Punjab, Rajasthan and Uttarakhand was studied. It was observed that growth, survival and nitrate reductase activity of leaves were adversely affected with the increase of water stress treatments. Monthly watering seedlings were severely affect as compared to weekly and fortnightly watering schedules. However, two clones collected from Uttar Pradesh
(2, Bijnor and 51, Gonda) one each from Haryana (57, Ambala) and Rajasthan (97, Sriganganagar) performed somewhat better than all clones studied.
Keyword :
Dalbergia sissoo; Morphology; Nitrate reductase activity; Watering schedules