Potentials of super absorbent polymer and humic acid under different irrigation regimes to improve crop and water productivity in wheat (Triticum aestivum l.)
| dc.contributor.advisor | Chaturvedi, Sumit | |
| dc.contributor.author | Nidhi | |
| dc.date.accessioned | 2023-02-02T13:51:42Z | |
| dc.date.available | 2023-02-02T13:51:42Z | |
| dc.date.issued | 2022-10 | |
| dc.description.abstract | A field experiment was conducted at D-3 block of NEB Crop Research Center, G B Pant University of Agriculture and Technology, Pantnagar (263145), Uttrakhand during rabi season of 2021- 2022. Experiment envisages assessing the impact of moisture conservation practices in relation to variable irrigation schedules on wheat crop. The experiment comprised of 3 irrigation levels (IW:CPE ratio 1.0, 0.80 and 0.60) and 4 moisture conservation practices (control, Super absorbent polymer once, Super absorbent polymer twice and Super absorbent polymer + Humic acid twice). The experiment was laid out in split plot design with irrigation levels in main plot and moisture conservation practice in sub plots replicated thrice. The soil of the experimental site was sandy loam in texture, neutral in pH (7.2), high in organic carbon (0.74%), low in available nitrogen (195 kg/ha), rich in potassium (284 kg/ha) and phosphorus (22.7 kg/ha). The irrigation depth was 50 mm. During the crop season, 154.3 mm rainfall was received. Field capacity and Permanent wilting point moisture in 0-15 cm soil layer was 21.8% and 7.04% and in 15-30 cm 20.9% and 6.26%, respectively. A double dwarf wheat variety HD-2967 was sown during the first fortnight of November with seed rate of 100 kg/ha. Recommended dose NPK was 120, 60 and 40 kg/ha. Growth parameters viz., plant height, tillers count, dry matter accumulation, NDVI, SPAD values were increased with irrigation application and recorded maximum at IW:CPE 1.00. The grain yield and biological yield increased significantly at IW:CPE 1.0 and 0.80 over 0.60. Yield attributes namely spikes/m2, grain wt/ spike and 1000 grain weight were recorded maximum at IW:CPE 1.0 followed by 0.80. The net return and B:C ratio were maximum at IW:CPE 1.0 and significantly higher than IW:CPE 0.60. The NPK content of wheat and its uptake decreased as the irrigation interval was increased from IW:CPE 1.0 to 0.80 and 0.60. The net energy return was higher in IW:CPE 1.0 as compared to IW: CPE 0.80 and 0.60. Soil moisture content as recorded before irrigation ranged from 15.23% (IW:CPE 1.0) to 6.75% (IW:CPE 0.60). Imposition of moisture conservation practices brought significant improvement in growth, yield attributes and yield of wheat over control. Values of all these parameters were recorded maximum with Super absorbent polymer + Humic acid twice treatment followed by Super absorbent polymer twice. The net return increased with increasing the level of moisture conservation practices, while B:C ratio was unaffected. The NPK content and uptake by wheat were found maximum with Super absorbent polymer + Humic acid twice and the lowest under control. Soil moisture content prior to irrigation ranged from 8.32% (control) to 13.76% (Super absorbent polymer + Humic acid twice). Thus, irrigation to wheat at IW:CPE 1.0, and application of Super absorbent polymer + Humic acid twice as basal and at pre- flowering stage is the most viable moisture conservation practice to offset moisture stress in wheat. | en_US |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810193148 | |
| dc.keywords | wheat, irrigation | en_US |
| dc.language.iso | English | en_US |
| dc.pages | 77 p. | en_US |
| dc.publisher | G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145 | en_US |
| dc.research.problem | Irrigation | en_US |
| dc.sub | Agronomy | en_US |
| dc.theme | Wheat | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Potentials of super absorbent polymer and humic acid under different irrigation regimes to improve crop and water productivity in wheat (Triticum aestivum l.) | en_US |
| dc.type | Thesis | en_US |