Phosphorus Management in Rice - Wheat Cropping System
| dc.contributor.advisor | R.S. Singh | |
| dc.contributor.author | Sanjay Kumar | |
| dc.date.accessioned | 2024-07-12T07:25:32Z | |
| dc.date.available | 2024-07-12T07:25:32Z | |
| dc.date.issued | 2000 | |
| dc.description.abstract | Rice-wheat is the most important and widely adopted cropping system in India. It contributes about 75 per cent to the national food basket. There is urgent need to increase the productivity of this system (4.62 to 5.57 t ha) to feed the anticipated 1004 million people by 2000 AD. Phosphorus is one of the most limiting nutrient governing the yield of rice and wheat. P-fixation capacity of lateritic soil is high and these soils show deficiency in available phosphorus even under waterlogged condition. Keeping this view, a field experiment was conducted during kharif and rabi seasons of 1997-98 and 1998-99 at BAU Farm, Kanke, Ranchi to study the effect of phosphorus management in rice-wheat cropping system. The soil was sandy loam in texture, acidic in reaction (pH 6.1) low in available nitrogen (235.5 kg N ha), phosphorus (9.93 kg P ha¹) and organic carbon (0.48%) and medium in available potassium (122 kg Kha¹). Treatment consisted of 3 levels of phosphorus (13.1.26.2 and 39.3 kg ha')in main plot and 6 levels of phosphorus frequency (T, P-application to both year kharif and rabi, T, P - application to both year kharif, T,: P-application to both year rabi, T.: P-application to first year kharif only. T, P application to first year rabi only and TP-application to first year kharif and rabi only) in sub-plot. The experiment was laid out in split-plot design with four replications. Result revealed that application of 39.3 kg P ha¹ recorded maximum plant height, number of effective tillers m². grains per panicle / spike, test-weight, grain and straw yields and it was statistically at par with 26.2 kg P ha. Rice grain equivalent yield responded upto 26.2 kg Pha (68.91 q/ha). Maximum net return (Rs. 10320 ha) and benefit: cost ratio (0.91) were recorded with application of 39.3 kg P hat and it was at par with due to 26.2 kg P ha (Rs. 9614 ha and 0.87). Among frequencies, direct and cumulative phases of P-application were significantly better than its residual phases with respect to yield attributing characters and yield of rice and wheat in both seasons. Analysis of pooled data revealed that maximum rice equivalent yield (79.65 q ha''), net return (Rs. 12122 ha) and benefit: cost ratio (1.06) were recorded when P was applied in all the seasons and it was at par with treatment receiving phosphorus only in rabi (70.79 q/ha': Rs. 10093 ha and 0.92) and treatment receiving phosphorus in first year kharif and rabi (70.80 q ha", Rs. 10177 ha¹ and 0.93). Both rice and wheat crops removed higher amount of N.P and K under 39.3 kg P ha level than its preceding levels. Direct and cumulative phases of P-application were significantly better than its residual phases with respect to N.P and K uptake. There was considerable buildup of P-status in soil with increasing levels of phosphorus and application of phosphorus in all the seasons after completion of the experiment. Energy out put and energy use efficiency (Both economical and biological) were maximum when 39.3 kg P ha-1 was applied to the crops, whereas among frequencies treatment receiving phosphorus in all the seasons were significantly superior to rest of the treatments. | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810211873 | |
| dc.language.iso | English | |
| dc.pages | 135 | |
| dc.publisher | Birsa Agricultural University, Ranchi | |
| dc.sub | Agronomy | |
| dc.theme | Phosphorus Management in Rice - Wheat Cropping System | |
| dc.these.type | Ph.D | |
| dc.title | Phosphorus Management in Rice - Wheat Cropping System | |
| dc.type | Thesis |