Effect of Humic acid on growth of Mango (Mangifera indica L.) nursery grafts Cv. Alphonso

Abstract

A field experiment was conducted to study the effect of humic acid on growth of mango nursery grafts Cv. Alphonso during 2011-2012. Randomly 50 Alphonso mango nursery grafts per treatment were selected and kept in nursery. Thus in all 3000 number of Alphonso mango nursery grafts were selected for further investigation. Series of humic acid concentration were prepared and drenching was done as per treatment details. Among different growth parameters studied, number of drenching had significant effect on most of the characters viz; plant height, leaf area, plant spread, girth at collar, root length, number of secondary and tertiary roots, dry matter. Similar to the effect of number of drenching, significant variations due to humic acid concentration treatments were also observed among different characters studied. The values for different growth parameters were increased with increasing levels of number of drenching different concentration of humic acid and their interactions. The better effects of number of drenching were obtained when drenching of humic acid was done four and five times. Further, increased concentration of humic acid was related with better results of most of the growth parameters. The concentration @ 7.5 ml and 10 ml humic acid/liter of water had better results on most of the parameters studied during the present investigation.