Effect of management practices on growth of white siris (Albizia procera), grain yield of Intercrops, weed population and soil fertility changes in agrisilviculture system In semi-arid India

摘要

An experiment was conducted during 2000-04 at Jhansi to analyze the effect of management practices, viz T_1 trees allowed to grow naturally + crop; T_2, pruning of trees up to 70% plant height + crop; T_3, T_1+ root barrier + crop; T_4, T_2+ root barrier + crop; T_5, T_1+ irrigation as per requirement of crop; T_6, T_2 + irrigation as per requirement of crop; T_7, pure tree (without crop) and T_, pure crop (without tree) on growth of tree, yield of intercrops, weeds and soil fertility in white siris[Albizia procera (Roxb.) Benth.J-based agrisilviculture system. Among all management practices, trees allowed to grow naturally (T_1 T_3 and T_5) significantly had higher tree growth (height, dbh and crown diameter) as compared to pruning of tree up to 70% plant height (T_2 T_4 and T_6). The grain yield of intercrops, viz blackgram [Vigna mungo (L.) Hepper and Indian mustard [Brassica juncea (L.) Czernj & Coss.] was significantly higher (0.59 and 1.22 tonnes/ha respectively) in pruning of tree up to 70%plant height than trees allowed to grow naturally during all the years except first year. The yield of intercrops with root barrier (T_3 and T_4) was higher (0.44-0.60 tonnes/ha blackgram and 1.02-1.19 tonnes/ha mustard) than without barrier (T_1 and T_2). In case of Indian mustard, irrigation given to the crop as per requirement (T5 and T6) significantly gave higher yield (25%) than the crop received one- irrigation (T_1 to T_4). The grain yield of pure crop (without tree) was higher compared to agrisilviculture. The weed population and dry weight of weed was significantly less in pure crop (without tree) than agrisilviculture at 1 year age of tree but weed population and weed dry weight was significantly less in agrisilviculture than pure crop at 4years age of tree. Integration of A. procera with crop also brought improvement in soil fertility in terms of organic carbon, available N, P and K.