Yield Performance of Lowland Paddy under Different Cultural Treatments in Kawlchaw East, Saiha District of Mizoram, India
- Select Volume / Issue:
- Type of Publication:
- Rice, NPK, Biofertilizer, Harvest Index, Benefit-Cost Ratio
- Sahoo, U. K.; Singh, S. L.
- This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. CC BY-NC-SA 4.0 Creative Commons License: https://creativecommons.org/licenses/by-nc-sa/4.0/
- Field experiments were conducted during summer and kharif, 2009 at farmers’ field in NAIP cluster area of Kawlchaw East village in Saiha district, Mizoram, India, to study the performance of improved rice variety (Shah Sarang and RCPL-187-4) against local (sticky) variety as test crops under different treatments viz., control (no fertilizers), NPK (85, 50 and 45 kg/ha) and NPK+biofertilizers. Nursery bed preparation, main field preparation, weeding and harvesting were performed as per the conventional system of rice cultivation. Results revealed that higher plant length at maturity were recorded with local varieties than improved varieties. Rate of tillering was more in improved varieties, highest recorded with RCPL-187-4 under NPK+biofertilizers (11.56 tillers.hill-1). Longest panicle length was observed with Shah Sarang (21.48 cm) and most number of grains per panicle in RCPL-187-4 (96.33) with NPK+biofertilizers treatment. Improved variety produced more yield than local one with application of fertilizers. RCPL-187-4 produced highest grain yield (3.76 t/ha) and straw yield (8.95 t/ha), followed by Shah Sarang (3.40 t/ha) under NPK+biofertilizers treatment. Also, highest increase in grain yield (150.37 %) over control was achieved in RCPL-187-4 with NPK+biofertilizers. Higher harvest index was obtained from the plots treated with fertilizers than from control plots (without fertilizers). Shah Sarang recorded highest harvest index (34.34%) amongst the varieties. Local variety had an invariable response to different levels of nitrogen, while breeding variety had a variable response. Improved variety had more harvest index compared to local variety for most combinations of fertilizer application levels, indicating that they allocated higher material to storage organs and transmitted more products from sources to its sinks (kernels). Higher net returns per hectare were obtained in improved varieties than the local variety. Cultivating RCPL-187-4 under NPK+biofertilizers fetched the highest benefit-cost ratio of 2.71. The local variety was most profitable when cultivated in control conditions.
Full text: IJRAS_292_Final.pdf