NUTRIENT CYCLING IN DISTURBED TROPICAL DRY DECIDUOUS TEAK FOREST OF SATPURA PLATEAU, MADHYA PRADESH, INDIA
Keywords:Biomass, nutrient return, nutrient uptake, nutrient use efficiency
In this paper, distribution of different nutrients in different life forms, their allocation in different tree components and nutrient cycling in some teak forests of Satpura Plateau are described. The nutrients in tree biomass were higher for disturbed and mature sites (I and II) as compared with younger and undisturbed sites (III and IV). The allocation of nutrient was higher for bole and lowest for leaves, irrespective of sites. The accumulation of nutrients in bole was higher for disturbed and mature sites whereas the trend was reverse for leaves. The contribution of belowground nutrients in tree biomass was higher for disturbed site I and lower for undisturbed site III. Tree, shrub and herb, contributed 87—94, 0.73—6 and 3.47—6.69% nutrients in aboveground biomass at different sites respectively. Nutrient uptake by trees was 41—51% of the total uptake at different sites, while herbs contributed 42—52% to the total uptake. Nutrient use efficiency as per unit biomass was higher for herbs followed by shrub and trees, irrespective of sites. The contribution of teak in total tree biomass nutrients were 62.66, 70.08, 84.60 and 99.92% for site I, II, III and IV respectively. The young and undisturbed sites showed higher contribution of nutrients in teak.