Faiz Mohsin , J. P. Singh

Abstract

Higher herbage and oil yield was recorded in pure fields of Mentha crops than their crops grown under Poplar and Eucalyptus stands. The first harvest of each crop of Mentha spp., yielded higher fresh herbage as well as oil in comparison to second harvest, both in pure as well as intercropped with Poplar and Eucalyptus stands. Maximum herb and oil yield was produced by M. arvensis and minimum by M. piperita, both in pure as well as intercropped stands. The trees intercropped with M. arvensis produced higher quantity of litter and minimum was in M. piperita. The quantity of litter production was higher in poplar than Eucalyptus. The concentration of nutrients (NPK) in the litter decreased with increasing age of stands. It was higher in Poplar than Eucalyptus. The total addition of nutrients was also recorded higher in Poplar than Eucalyptus.

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Faiz Mohsin , R. P. Singh , K. Singh

Abstract

Net primary productivity, concentration of N, P, K(% dry weight) standing state of N, P, K (kg ha^-1), uptake of N, P, K (kg ha^-1 y^-1) in different components of Populus deltoides at different ages as affected by different treatments were studied under agro-forestry systems involving P. deltoides with intercrop of aromatic crops at Central Institute of Medicinal and Aromatic Plants, Regional Centre, Pantnagar, Uttaranchal. NPP was found lowest in pure stands of P. deltoides than the intercropped stands. Among the intercropped stands it is found highest in M. arvensis and lowest in Cymbopogon winterianus. The concentration of N, P, K in different tree parts decreased with the increase in age of plantations. It remained at a lower level in pure stands in comparison to intercropped stands. Standing state of N, P, K (kg ha^-1) in different components of P. deltoides, increased with the increase in age of plantations. But, in uptake of N, P, K (kg ha^-1 yr^-1) in different components of P. deltoides, decreased as the tree goes towards maturity, but in foliage it is just reverse to the above fact.

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Faiz Mohsin , R. P. Singh , D. K. Rajput

Abstract

Eucalyptus hybrid trees grown in stands intercropped with various Mentha and Cymbopogon spp. attained better growth than pure stands at juvenile (2 and 3 yrs.) and advanced (6 and 7 yrs.) ages. Bolewood provided maximum contribution among all the components in pure as well as intercropped stands at all the age group of trees. It was further revealed that the total biomass was highest in the plantation of Eucalyptus hybrid of all the ages intercropped with Mentha spp. It decreased in Cymbopogon spp. but still reained higher than that of pure stands which showed lowest biomass production.

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Faiz Mohsin , R. P. Singh , K. Singh

Abstract

Populus deltoides trees grown in stands treated with various Mentha and Cymbopogon'spp. attained better growth than their pure stands at juvenile (2 and 3 years) and advanced (6 and 7 years) ages. Bolewood provided maximum contributed among all the components in pure as well as intercropped stands at all the age group of trees. It was further revealed that the total biomass was highest in the plantation of P. deltoides of all the ages intercropped with Mentha spp. It decreased in Cymbopogon spp. but still remained higher than that of pure stands which showed lowest biomass production.

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Faiz Mohsin , R. P. Singh , K. Singh

Abstract

The annual litter production increased with increasing age of the Eucalyptus plantations both in the pure and intercropped stands with Mentha and Cymbopogon spp. An increase in litter production was recorded in all the intercropped in comparison to pure stands at all the ages. Higher concentration of N, P and K was observed in the litter of the intercropped stands which decreased with increasing ages of the stands. The total addition of nutrients through litterfall to the soil was higher in the intercropped than the pure stands. The N, P and K contents of the soil under the pure stands was higher than those of inter cropped stands. Maximum amount of N and K was found in the superficial layer of the soil which decreased with increasing depth. Most of the Phosphorus was accumulated in the soil at the depth of 15-30 cm in all the stands. The available N, P and K in the soil increased with increasing age of the stands.

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Faiz Mohsin , R. P. Singh , K. Singh

Abstract

Populus deltoides trees grown in stands treated with various Mint and Cymbopogon spp. attained better height and dbh than their sole stands at their early (2 and 3 years) and advanced (6 and 7 years) ages. The contribution of various components viz., bole branches, foliage and bark to the above ground biomass varied in the sole and treated stands. At all the ages the contribution of bolewood remained highest followed by branches, foliage and bark both in the sole and treated stands. Bolewood contribution was maximum in the sole in comparison to treated stands, whereas contribution of branches, foliage and bark remained highest in the stands treated with M. arvensis and lowest in sole stands. The respective values for other treated stands remained in between the sole and M. arvensis treated stands at all the ages.

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