Performance of Pre Released Rice (Oryza sativa L.) Genotypes under Different Sowing Windows in Rabi Season

Abstract

The aim of this study was to investigate the effect of different sowing dates on growth and yield potential of pre released rice genotypes under irrigated conditions of Northern Telangana zone. The field experiments were carried out during two consecutive rabi seasons of 2018-19 and 2019-20, on clay soils of agricultural research station, Kunaram, Telangana state, India. The experiment was laid out in strip plot design with three replications. The treatments comprised of three sowing dates i.e. 20th November, 5th December and 20th December in horizontal factor and four genotypes i.e. KNM 733, RNR 15048, KNM 1638 and KNM 118 in vertical factor. Pooled data analysis results revealed that the different sowing dates and genotypes significant effect on all the studied growth and yield characters. The rice crop sown on 20th December recorded significantly higher grain yield ( 8138 kg ha-1) and Among the genotypes, the short slender, short duration genotype KNM 733 recorded the recorded the maximum grain yield ( 8024 kg ha-1), which was on par with the other genotypes. The treatment combinations data results concluded that the, among the genotypes the genotype KNM 118 was recorded highest grain yield (8438 kg ha-1) when sowing was taken up on 20th December and followed by the genotype KNM 733 with sown on 20th November. In respect of economics of treatment combinations, the highest net returns (Rs.91,165 ha-1) and B:C (2.47) ratio were obtained when rice crop was sown during 20th December with the genotype KNM 118 and followed by sown on 20th November with the genotype KNM 733.

Effect of Dates of Sowing on Grain Yield of Rabi Rice (Oryza sativa L.)

“…Similar findings were reported by Bindu and Bhanumurthy [7]. These results align with the research conducted by Anil and Siddi [8] and Bindu [9], who reported that plant height is influenced by genotypes, various management factors and the environment. The increased plant height observed in delayed sowings in the season could be attributed to greater exposure to solar radiation and heightened photosynthetic activity.…”

“…It might be due to the genetic character of the variety and higher photosynthetic efficiency. These results are similar to those obtained by Anil and Siddi [8], Nizamani et al [11] and Suleiman et al [12] who observed that plant height differed significantly among the varieties.…”

Effect of Sowing and Harvesting Times on Growth Characters and Grain Yield of Rabi Rice (Oryza sativa L.)

“…Lower values of grain yield were found in M 3 (Chintu).The superiority of Telangana sona and Jagtial rice 1 might resulted from its better growth character i.e., dry matter accumulation.These results are in accordance with Bindu [19]. Among different sowing and harvesting dates, S 5 (Delay sowing by 30 days (December 15) and harvesting at physiological maturity) shown significantly higher grain yield over all other treatments followed by S 6 (Delay sowing by 30 days (December 15) and harvesting at 7 days after physiological maturity), which was on par with S 1 (Normal sowing time (November 15) and harvesting at physiological maturity )and S 3 (Delay sowing by 15 days (November 30) and harvesting at physiological maturity).The lower values of grain yield were found in S 2 (Normal sowing time (November 15) and harvesting at 7 days after physiological varieties sowing and harvesting dates maturity).The increased yield might be due to higher dry matter accumulation associated with favorable temperature in delayed sowing responsible for more growth and development, resulting in more storage of photosynthates in the grain during rabi conditions.These findings are similar to Bindu [19].These results are in accordance with Anil and Siddi [9] and Chendge et al [20].The interaction effect was found nonsignificant for grain yield of rice crop among the varieties and different sowing and harvesting dates.…”

“…Though some studies were carried out regarding performance of long slender rice varieties in rabi season. pertaining to yield Anil and Siddi [9], no research studies were conducted with market demand fine grain rice varieties especially under delayed sowings/harvestings, which is a common problem in most of the farmers fields. By considering all the above facts, the following work was put forth.…”

Evaluation of Different Varieties and Nitrogen Levels on Growth and Yield of Black Rice (Oryza sativa L.)

“…The significant and higher grain yield was observed with the variety Chakhao Poireiton might be due to higher number of effective tillers attributed to higher affinity of this variety and yield contributes associate with favourable weather condition followed by differential ability of cultivars and photoassimilate, which resulted in the higher grain yield. Similar result was reported by Anil and Siddi [32]. Further significantly higher grain yield was observed with the application of nitrogen (80 kg/ha) might due to the availability more water enhanced nutrient availability which improved nitrogen and other macro and microelements absorption enhancing the production.…”