| dc.contributor.advisor | MD. SHAHJAHAN SARKER | |
| dc.contributor.author | SARKER , MD. SHAHJAHAN | |
| dc.date.accessioned | 2022-04-20T08:06:36Z | |
| dc.date.available | 2022-04-20T08:06:36Z | |
| dc.date.issued | 2010-02 | |
| dc.identifier.uri | http://localhost:8080/xmlui/handle/123456789/317 | |
| dc.description | -Rice (Oryza sativa L.) is the staple food of Bangladesh where it’s production has
increased more than two times during the last 3 decades and reached more than 25
million tons in 2006-2007 (BBS, 2008). Rice production is needed to be increased from
3 tons ha’! to 5 tons ha-1 in next 20 years for food security (Mahbub ef al., 2001). The
majority of rice area is covered by aman (Autumn) rice conipslsing abiout 52.77% of the
total rice area of which transplanted aman rice cover 87.05% (BBS, 2003). Among the
various factors responsible for low rice production, weeds are considered to be as one of
the major limiting factors due to manifold harmful effects (Kalyanasundaram et al.
2006). Weeds uptake the available nutrients, compete with crops for water, light and
space. Weeds are the most competitors in their earlygrowth stages than the later and
hence the growth of crops slows down and grain yield decreases (Jacob and Syriac,
2005). Mamun (1990) reported that weed growth reduced the grain yield by 16-48% for
transplantedaman rice. To reduce the cost of rice production, it has been urgently needed
to adopt alternative method of weed control viz. mechanical weed control, biological
weed control, and chemical weed control in combination with manual weeding. | en_US |
| dc.description.abstract | An experiment was carried out at the Field Laboratory, Department of Agronomy,
Hajee Mohammad Danesh Science and Technology University, Dinajpur during
Boro season (December to May), 2008-09 to study the effect of weed control
measures on the yield of BRRI dhan29. The experiment was laid out in the RCB
design with three replications accommodating three weed control measures i.e.
Ronstar 25EC, Rifit SOOEC and Amchlor 5G with different doses. The results
showed that the experimental field was infested by thirty two weed species from
thirteen families of which Ali ghas/ Bahuea (Cyperus difformis L.) Cyperaceae,
mutha (Cyperus rotundus L.) Cyperaceae, Anguli (Digitaria sanguinalis L. scop)
Gramineae, Arail (Leersia hexandra L.) Gramineae, Chanchi (Alternanthera
sessils R.Br.) Amaranthaceae, Kesoti (Eclipta Prostrata L.) Compositae, were the
most dominant species. The other dominant species was susnisakh (Marsilea
quadrifolia L.) On the other hand, minimum infesting weed species was durba
(Cynodon dactylon L.). The influence of herbicides at different doses showed
significant effects on the weed density, weed dry weight and the herbicides also
affect the yield and yield attributing characteristics under study. The yield
attributes were significantly influenced by weed control measures. Among those
the application of pre and post emergence herbicidal effect on weed population at
45 and 73 days after transplanting had the lowest (16.33 no) and the highest
(250.00 no) weed density were found in control plot respectively. From the
analysis of herbicidal effect among Ronstar 25EC, Rifit SOOEC and Amchlor 5G
noticed that the highest yield (4.40 tha’) was found by the application of Ronstar
25EC @ 2010 mlha” and the lowest yield (2.70 tha’) obtained from the treatment
of control plot. Observed that the application of Ronstar 25EC@2010 mlha’! i.e.
recommended dose maximized the highest yield (4.40 tha’')and the second highest
yield (4.38 tha’) were obtained from the treatment of recommended dose of Rifit
500EC @ 1005 mlha’. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR. | en_US |
| dc.subject | PRODUCTIVITY OF BRRI DHAN29 | en_US |
| dc.subject | Puddle seeded rice | en_US |
| dc.subject | Transplanted rice | en_US |
| dc.title | FIELD PERFORMANCE OF RONSTAR, RIFIT, AND AMCHLOR AS HERBICIDES FOR WEED CONTROL AND PRODUCTIVITY OF BRRI DHAN29 | en_US |
| dc.type | Thesis | en_US |
