S. Nautiyal , D. S. Negi , Shiv Kumar

Abstract

The effect of water stress and some antitranspirants on the chlorophyll contents of the leaves of Pongamia pinnata (L) Pierre, were studied uuder controlled laboratory conditions. The chlorophyll a, b and total, invariably increased from daily to fortnightly watering interval, however there is a sharp decrease in case of monthly watering interval. The chlorophyll a, b, ratio was maximum at weekly watering interval minimum at monthly watering interval. It shows that the mild trees effects the formation/ accumulation of chlorophyll b more than chlorophyll a (weekly watering interval) however, heavy stress destroy both chlorophyll a and b with the result less photosynthesis and low growth (monthly watering interval).

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Adarsh Kumar , Mohinder Pal , Shiv Kumar

Abstract

A technology developed for production of field planting stock of Dendrocalamus hamiltonii has been described. The advantage of this technology is that it is low cost, simple, easy and involves the use of locally available materials and has direct application in the field. The dependence on bamboo seed production in nature is totally eliminated from second year onwards for mass production of field plantable bamboo saplings. The planting stock, developed vegetatively through macro-proliferation remain small in size which is additional advantage as these are easy to handle and transport. The technology developed, will help to overcome the scarcity of planting stock of bamboo in absence of seed. A plan has been developed and described in this paper for production of 16,000 field plantable saplings of D. hamiltonii vegetatively every year for any desired number of years. Depending upon the targets and the facilities available, the planting stocks in multiples of 16,000 can be produced each year.

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