http://localhost:8080/handle/123456789/2778 2026-04-18T14:14:52Z http://localhost:8080/handle/123456789/2532 EFFECT OF REDUCED LIGHT INTENSITIES ON GROWTH AND YIELD OF TWO CUCURBITS KABIR, MD. HEADAYET ULLAR The experiments were carried out at the research farm of Sher-e-Bangla Agricultural University. Sher-e-Bangla Nagar, Dhaka-1207 to investigate the growth and yield performance of two cucurbits (viz, bottle gourd and ash gourd) under four different levels of light intensities (100. 75, 50 and 25% PAR).The experiments were laid out following Randomized Complete Block Design (RCBD) with three replications. After crop establishment, nylon nets of different sieve sizes were used to create treatments of different reduced light and light intensity was measured by a light meter. Morphological characters like internode length. and individual leaf area increased whereas number of leaves plani', branches plant" and individual fruit weight were decreased due to the reduction of light levels in the vegetables. At 25% PAR level, the number of leaves plant" decreased markedly in cucurbits, bottle gourd and ash gourd. Main stem length, stem weight ratio remained almost unchanged in bottle gourd and ash gourd under different light levels. Leaf weight ratio (LWR) slightly reduced in both bottle gourd and ash gourd. Compared to 100% PAR the total thy matter (TDM) of bottle gourd and ash gourd did not affected by reduction of light levels up to 75% PAR. The highest dry matter yield plant" (634.53 g and 556.47 g) were achieved from 100% PAR level in bottle gourd and ash gourd. respectively. At 100% PAR level, the fruit yield were 42.40 ha" in bottle gourd and 44.13 tha" in ash gourd. Significant fruit yield reduction was obscrvcd at 25% PAR in both ash gourd and bottle gourd. The bottle gourd provided significantly higher yield (52.42 t ha") at 75% PAR level compared to hill sunlight. The higher fruit yield was the product of higher fruit plant" and higher individual fruit weight. These results suggested that bottle gourd is more suitable as under storey crop compared to ash gourd. A Thesis Submitted to the Faculty of Agriculture Slier-c-Bang/a Agricultural University, Dhaka In partial Jitifuilment of the requirements for the degree of MASTER OF SCIENCE (MS) IN AGRICULTURAL BOTANY SEMESTER: JANUARY-JUNE, 2010 2010-06-01T00:00:00Z http://localhost:8080/handle/123456789/339 EFFECT OF SOWING DATES ON GROWTH AND YIELD PERFORMANCE OF SOME SELECTED WHEAT (Triticwn aestivum L) GENOTYPES AHMAD, GAZI ASHRAF UDDIN The experiment was carried out at the experimental field of Sher-e-Bangla Agricultural University, Dhaka during November 2009 to March 2010 to observe the effect of sowing dates on growth and yield performance of some selected wheat genotypes. The experiment comprised of two factors, viz. Factor A: Sowing dates (4 sowing dates) - Sowing on 17 November, 2009: Sowing on 30 November, 2009: Sowing on 15 December, 2009 and Sowing on 30 December. 2009 and Factor B: Wheat genotypes (9 wheat genotypes)- BAW-1064. Sourab, 4  Prodip, Fang-60. Gourab. Sufi. Shatabdi. Pavan-76 and Bijoy. The experiment was laid out in Two Factor Randomized Complete Block Design (RCBD) with three replications. Data on different yield contributing characters and yield were recorded and significant variation was recorded for sowing dates, wheat genotypes and their interaction effect. At 30, 40. 50. 60 DAS and harvest the longest plant (45.09 cm. 66.40 cm, 82.56 cm. 86.20 cm and 89.83 cm) was recorded from sowing on 30 November. 2009 and the shortest plant (40.7$ cm, 59.51 cm. 74.99 cm, 77.87 cm and 80.65 cm) from sowing on 30 December, 2009. The highest grain yield hi1 (3.64 ton) was found from sowing 30 November. 2009, whereas the lowest (3.15 ton) was recorded from sowing 30 December, 2009. At 30, 40, 50, 60 DAS and harvest the longest plant (45.36 cm, 66.34 cm, 82.77 cm. $6.84 cm and 90.50 cm) was obtained from Gourab, whereas the shortest plant (40.70 cm. 61.20 cm. 76.44 cm. 79.57 cm and 81.64 cm) was recorded from Bijoy. The highest grain yield ha (3.67 ton) was found from Sourab and the lowest (3.10 ton) was observed from 13i joy. At 30, 40. 50. 60 DAS and harvest the longest plant (49.41 cm. 71.85 cm, 89.72 cm. 94.24 cm and 98.36 cm) was observed in sowing on 30 November. 2009 x Gourab, again the shortest plant (39.37 cm, 56.89 ciii. 71.63 cm. 73.79cm and 76.31 cm) was recorded from sowing on 30 December. 2009 x Bijoy. The highest grain yield hi' (4.15 ton) was found from sowing on 30 November. 2009 c Sourab. whereas the lowest (2.85 ton) from sowing on 30 December, 2009 x Shatabdi. The variety Gourab provided better and steady yield in case of first, second and third sowings whereas. Gourab and BAW-1064 provided better yield when sown on 30 November. However, the yield was reduced in case of all the varieties when sown on 30 December. 2010-12-01T00:00:00Z http://localhost:8080/handle/123456789/338 EFFECT OF TRANSPLANTING DATES ON THE GROWTH AND YIELD OF HYBRID RICE (Oryza saliva L.) VARIETIES IN AUS SEASON HOSAIN, MD. TOFAIL A field experiment was conducted at the Agricultural Botany Experimental field of Sher-e-Bangla Agricultural University (SAU), Dhaka during Aus season in March to July 2010, with a view to study the effect of transplanting dates on the growth and yield of hybrid rice varieties along with one modem variety. The experiment consisted of two levels of treatments viz. A: Three varieties where two of them were hybrids and one was inbred: Fleera2, Aloron (Hybrid) and BRRI dhan48 (Inbred). B: Four transplanting dates: 16°' March. 31 March, 150' April and 301h April. The experiment was laid out in randomized complete block design with three a   replications./perimental results showed that transplanting dates and varieties individually had significant effect on the growth and yield parameters like plant height, number of total tiller hill, leaf area hilF1 . total dry weight (g hilt'), light interception percent, chlorophyll content at flag leaf stage, number of effective tiller hilt', panicle length, number of filled spikelet panicle', number of unfilled spikelet panicle1, number of total spikelet panicle', spikelet filling percent, grain yield (t hi 5. straw yield (t ha'), biological yield (t ha') and harvest index (%)fFhe results revealed that 16° March transplanting gave the highest grain yield (3.82 t ha Chlorophyll content Was higher in Heera2 followed by, Aloron. In contrast chlorophyll content was lower in BRRI dhan48. Among the varieties BRRI dhan48 gave the highest grain yield (3.5 It ha1) but both the hybrid varieties Heera2 (3.03 t ha') and Aloron (2.77 t ha4) gave lower grain yield due to higher spikelet sterility because of more sensitiveness of hybrid rice varieties to high temperaPire and low sunshine hour at grain filling stage. The combined effect of transplanting dates and variety had also significant effect on yield and yield contributing characters. BRRI dhan48 transplanting on 161' March showed highest grain yield attaining good yield contributing characters. 2010-12-01T00:00:00Z http://localhost:8080/handle/123456789/337 TILLERING, DRY MATTER ACCUMULATION AND PRODUCTIVITY OF HYBRID RICE IN AMAN SEASON MAHMUD, JUBAYER-AL A field experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University during July to December 2010 to find out the effect of 1, 2 or 3 seedling(s) per hill on growth. yield and yield components of a modern inbred (BRRI dhan49) and four hybrid (BRRI hybrid dhan2. Heera, La and Aloron) transplant Atnan rice varieties. The experiment was laid out in factorial randomized complete block design with three replications. Results showed that rice cultivars differed significantly in all growth characters, such as, plant height, tillers number, chlorophyll content, dry matter weight of different plant pafls, panicle length, filled grain, unfilled grain, grain filling percentage, 1000-grain weight, grain yield and straw yield. All the varieties exhibited higher amount of chlorophyll over inbred BRRI dhan49 in their flag leaf. Leaf dry matter, stem dry matter and total dry matter accumulation ability higher in inbred BRRI dhan49 compared to all studied hybrid rice varieties. The inbred variety BRRI dhan49 produced the highest grain (5.58 t hi') and straw yield (8.13 t hi'). Numbers of seedling(s) per hill had remarkable influence on number of total tillers per hill and total dry matter production and single seedling per hill gave the highest grain yield (4.20 t hi'). The higher grain yield was attributed mainly to the number of effective tillers per hill, filled grains per panicle and 1000-grain weight. Remarkable grain and straw yield were found from the interaction of BRRI dhan49 planted 1 seedling per hill. 2010-12-01T00:00:00Z