Effect of Integrated Nutrient Management Practices on Important Soil Properties in Terraced Land under Continuous Cultivation of Rice (Oryza sativa L.) variety Teke in Nagaland

摘要

A field experiment was carried out at experimental research farm, Department of Soil and Water conservation, SASRD, Nagaland University. The experiment was maintained for eleven years continuously and local rice variety Teke was used for this researchevaluation. The soil samples were collected in kharif 2011 from the field to investigate the effect of nutrient management practices on important soil properties in terraced land under continuous cultivation. The experiment was laid down in Randomized Block Design (RBD) with!2 treatments and each treatment was replicated three times. The results revealed that the maximum WHC and hydraulic conductivity was recorded in Vi N+ PK+ V2 N Forest litter with 43.20% and 3.00 cm hr1 while the minimum was recorded in control with 33.20% and 2.30 cm hr1, respectively. The highest percent aggregates > 0.25 mm and mean weight diameter of the soil was recorded in NPK+ FYM+ Zn with 72.60% and 2.60 mm while the lowest was recorded in control with 53.30% and 1.20 mm, respectively. The highest organic Carbon was recorded in '/2N+ PK+ '/iN Forest litter with 3.10% and lowest was recorded in control with 1.60%. The highest pH was recorded in Forest litter burned+ Vi FYM with 4.90 and lowest was recorded in NPK and V2N+ PK+ Azospirillum with 4.30. The highest CEC was recorded in NPK+ Poultry litter with 24.70 cmol (p+) kg-1 and lowest was recorded in control with 18.20 cmol (p+) kg-1. In terms of the available NPK, the highest available N and P was recorded in NPK + FYMwith 568.40 kg ha-1 and 21.90 kg ha-1 while the lowest was recorded in control with 310.30 kg ha-1 and 8.20 kg ha1, respectively. Available K was recorded maximum in '/2N+ PK+ V2N Forest litter with soil varied from 298.30 kg ha1 and minimum was recordedin control with 143.70 kg ha1.