Thumbnail Image

Thesis

Browse

2017 - 201912020 - 20211
Reset filters
Author: Prabhjit Kaur × Start date: 2017 × Type: Thesis × Thesis Type: Ph.D ×
Reset filters

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    ThesisItemOpen Access
    Maximizing rice yield through agronomic interventions and its effect on system productivity, quality and soil health in rice-wheat cropping system
    (Punjab Agricultural University, Ludhiana, 2021) Prabhjit Kaur; Saini, K S
    The present investigation entitled ―Maximizing rice yield through agronomic interventions and its effect on system productivity, quality and soil health in rice-wheat cropping system‖ was carried out for two consecutive years during 2018-19 and 2019-20 at two locations viz. Punjab Agricultural University, Ludhiana and Research Station, Dyal Bharang, Amritsar. The soil at Ludhiana was Loamy sand and soil of Dyal Bharang was Clayey loam in texture and Low in nitrogen, medium in available phosphorus and medium in potassium. The two experiments, were laid in split plot design, with four replications. First experiment consisting of four main plot treatments of rice i.e. dates of transplanting (25th June and 10th July) and crop geometry (25 cm x 15 cm and 15 cm x 15 cm) and four sub plot treatments i.e. age of seedlings (3 week, 4 week, 5 week and 6 week old seedlings). Whereas, in second experiment, In rice, four main plot treatments were (green manuring (GM), farmyard manure (FYM), poultry manure (PM) and control (NA)). Four subplot treatments were (control (N0), 50 kg N ha-1 (N50), 75 kg N ha-1 (N75) and 100 kg N ha-1 (N100)). In wheat, residual effect of organic amendments and nitrogen levels applied to preceding rice was evaluated. The results revealed that growth and productivity of short duration rice crop were improved by transplanting younger seedlings (3 and 4 weeks) as compared to the older ones (6 week). Transplanting of rice at 25th June and 10th July with 20x15 cm crop geometry produce better growth, yield attributes and yield as compared to 15x15 cm crop geometry. Rice transplanted on 10th July contributed to lesser water consumption than that of transplanting on 25th June and saved (12.5 percent, 10.5 percent) irrigation water during 2018 and 2019, respectively without any reduction in yield. Application of PM in rice helped to increase grain yield by 65.32% and 61.35% over NA followed by GM and FYM which helped to increase yield 60.93, 56.06 % and 55.26, 53.72 % over NA during 2018 and 2019, respectively. Integration of PM with 100 kg N ha-1 was recorded higher yield, which was at par with 75 kg N ha-1 and significantly better than 50 kg N ha-1 and control. The soil properties like OC, BD, available NPK, nutrient uptake, micronutrient content, infiltration rate improved under PM followed by FYM and GM with increased nitrogen doses. After the end of experiment, total microbial count, DHA, APA and BSR significantly increased with increasing nitrogen doses such as N100 as well as N75 combined with the application of PM followed by GM and FYM at both locations. System productivity and N-use efficiency significantly influence the application of different amendments and nitrogen levels in rice-wheat cropping system. Milling quality, L:B were found significantly higher with PM followed by GM and FYM. N100 recorded better milling quality which was at par with N75. Physical and chemical grain characteristics of wheat were recorded higher in PM which was significantly superior than GM and FYM. Highest REY was recorded with poultry manure being higher than those found in other treatments. The highest energy use efficiency of rice was recorded with green manure as compared to other treatments. In wheat crop, residual effect of poultry manure recorded the highest energy use efficiency. Poultry manure and N100 registered significantly the highest economic parameters and system productivity for both rice and wheat crops compared rest of the organic treatments.
  • Thumbnail Image
    ThesisItemOpen Access
    Effect of growth regulators on in vivo budding in roses (Rosa hybrida L.)
    (Punjab Agricultural University, Ludhiana, 2017) Prabhjit Kaur; Grewal, H.S.
    The present investigations entitled “Effect of growth regulators on in vivo budding in roses (Rosa hybrida L.)” were carried out on the Research Farm, Department of Floriculture and Landscaping, Punjab Agricultural University, Ludhiana, during 2014-16. The experiments were conducted to study the effect of auxin on the rooting of the budded cuttings and cytokinin on bud take in Rosa hybrida L. in two different cultivars, viz. First Red and Grand Gala. The mature shoots (>1 yr old) of rootstocks, viz. R. indica var. odorata, R. multiflora and R. bourboniana were used for making the stem cuttings. In Experiment I, rootstock cuttings (8-9 inches long, pencil thickness) were treated with different concentrations of IBA for rooting and budded with the scion of rose cvs. First Red and Grand Gala in December- February. In Experiment II, the rootstock cuttings were treated with IBA 1500 mg L-1 for rooting and budded with the scion of rose cvs. First Red and Grand Gala after treating with BAP concentrations in December- February. The type of rootstock and growth regulators treatments significantly (p<0.05) affected the plant growth and flowering of two rose cultivars. The per cent sprouting, survival, shoot length, plant height, number of leaves and flowers per plant were observed the highest in rootstock R. indica var. odorata, whereas, per cent rooting and number of branches were at par in R. indica var. odorata and R. multiflora. The IBA treatment T4 (2000 mg L-1) was found the best regarding per cent sprouting (85.00, 81.67) and rooting of cuttings (91.67, 96.67) survival (68.34, 65.00), shoot length (13.64 cm, 16.29 cm), plant height (20.60, 20.66 cm), number of branches (3.20, 2.84), leaves (9.61, 10.94) and flowers per plant (3.08, 2.07) in rose cv. First Red and Grand Gala, respectively. The best BAP treatment for per cent sprouting (91.66, 88.34), survival (86.67, 86.67), shoot length (15.01 cm, 17.94 cm), plant height (23.01 cm, 24.15 cm), number of branches (3.53, 3.39), leaves (9.95, 11.31) and flowers per plant (2.21, 2.50) was in T4 (BAP 20 mg L-1) in rose cv. First Red and Grand Gala, respectively. It was concluded that the rootstock R. indica var. odorata performed better for First Red and Grand Gala among the different rootstocks tested. The auxin and cytokinin improved the vegetative growth and flowering of the rose plants. The treatment of cuttings with IBA @ 2000 mg L-1 and scion bud with BAP @ 20 mg L-1 were the best for the plant growth and flowering of cv. First Red and Grand Gala budded on R. indica var. odorata rootstock.