Effect of different weed management options on weed flora, rice grain yield and economics in dry direct-seeded rice

2020 ◽  
Vol 52 (2) ◽  
pp. 102
Author(s):  
P. Saravanane
Keyword(s):  
Grain Yield ◽  
Weed Management ◽  
Rice Grain ◽  
Management Options ◽  
Weed Flora ◽  
Direct Seeded

scholarly journals Fertilizer and Weed Management Options for Direct Wet Seeded Rice in Dry Season

2016 ◽  
Vol 20 (1) ◽  
pp. 65-75 ◽  
Author(s):  
R Shultana ◽  
JC Biswas ◽  
MAA Mamun ◽  
L Nahar
Keyword(s):  
Grain Yield ◽  
Weed Control ◽  
Weed Management ◽  
Dry Season ◽  
Control Measures ◽  
Rice Seed ◽  
Management Options ◽  
Weed Density ◽  
Direct Seeded ◽  
Hand Weeding

Direct seeding of rice is an emerging technology. However, direct seeded rice culture in the main field is hindered by enormous weed infestation and it lacks judicious fertilizer management. So, experiments were conducted during dry seasons of 2010 and 2012 with three fertilizer packages and four weed control measures. Rice seed was sown in the field using drum seeder in wet soil. The results revealed that weed density and weed biomass were strongly influenced by weed control methods and fertilizer rates. Weed density was higher in unweeded plots with 140:36:43 kg NPK ha-1. Among the species Echinichloa crusgalli (L.) P. Beauv. was the dominant species. Three hand weeding controlled maximum weeds. Uses of herbicide for controlling weeds were above 80 and 70% effective. Strong negative correlation was recorded between grain yield and weed density. Herbicide with one hand weeding and BRRI weeder in combination with 160:46:53 kg NPK ha-1 produced about 81- 104% higher grain yield than no weeding. Weed free plot produced 112% higher yield with 160:46:53 kg NPK ha-1. Besides, herbicide with one hand weeding and BRRI weeder treated plot produced similar yield irrespective of fertilizer doses. The strong positive and linear relationship was found in case of yield and yield components. Herbicide with one hand weeding and 120:26:33 kg NPK ha-1 gave higher net return (1145 $/ha). The benefit cost ratio was also higher in herbicide based weed management with reduced rate of fertilizer. Direct seeded culture using herbicide with one hand weeding and 120:26:33 kg NPK ha-1 could be an option for reducing production cost in dry season along with satisfactory grain yield.Bangladesh Rice j. 2016, 20(1): 65-75

scholarly journals Correlation Study on Growth and Yield Components of Rice (Oryza sativa L.) Varieties Grown under Integrated Weed Management in Sudan Savanna of Nigeria

2019 ◽  
pp. 1-6 ◽  
Author(s):  
A. A. Ajala ◽  
A. Muhammad ◽  
A. I. Yakubu ◽  
M. Adamu ◽  
Y. A. Busari
Keyword(s):  
Grain Yield ◽  
Weed Management ◽  
Growth And Yield ◽  
Integrated Weed Management ◽  
Yield Reduction ◽  
Rice Grain ◽  
Management Options ◽  
Rice Varieties ◽  
Area Index ◽  
Sudan Savanna

Weeds are the most prominent of all rice biotic stresses across all the ecologies in terms of yield reduction and increased cost of production. Weed control is therefore one of the most important and suggestive practices for potential rice production. Based on the above, field trials were carried out during 2017/2018 dry season at the Teaching and Research Fadama farm of the Kebbi State University of Science and Technology located at Jega (Latitude 12º21ˈN; Longitude 4º36ˈE) and that of Usmanu Danfodiyo University Sokoto located at Kwalkwalawa (Latitude 130 01ˈN, Longitude 5º09ˈE) to study the correlation between yield and selected parameters of some rice varieties grown in an integrated weed management (IWM) system. Both locations lie within the Sudan Savanna ecological zone of Nigeria. The experiment was done between December, 2017 and August, 2018. The treatments consisted of six (6) weed management options (Solarization/Orizo-plus (3WAT)/Hoe-weeding (6WAT), Round-up/Orizo-plus(at 3WAT)/Hoe-weeding (6WAT), Solarization/Hoe-weeding (3WAT)/Hoe-weeding (6WAT), Round-up/Hoe-weeding (3WAT)/Hoe-weeding(6WAT), Weedy-check and Weed-free) and three (3) rice varieties (Jamila, Faro 44 and Faro 57). The factorial combinations of the treatments were laid out in a randomized complete block design (RCBD) with split-plot arrangement, replicated three times. Weed management options formed the main plots while rice varieties were assigned to the sub-plots. Based on the results of this study, it could be concluded that high weed density in rice field causes poor rice growth and reduces grain yield (r=-0.757). Also, increase in number of leaves, number of tillers, leaf area index, percent productive tillers, length of panicle, weight of panicle and 1000-grain weight resulted to increased grain yield. Therefore, factors that encourage the performance of those parameters can be explored for high rice grain yield.

scholarly journals Response of Rice to Tillage, Wheat Residue and Weed Management in a Rice-Wheat Cropping System

Agronomy ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1734
Author(s):  
Bisheshwor P. Pandey ◽  
Tanka P. Kandel
Keyword(s):  
Grain Yield ◽  
Weed Management ◽  
Cropping System ◽  
Conventional Tillage ◽  
Rice Grain ◽  
Growing Seasons ◽  
Direct Seeded ◽  
Manual Weeding ◽  
Ct System ◽  
Residue Retention

In Nepal and elsewhere in the Indo-Gangetic plains where rice-wheat is a major crop rotation, interest in conservation practices such as direct-seeding of rice on zero-tilled soil and retention of crop residue is increasing. However, the use of herbicide is increasing in the region due to a shortage of labor and its ease of operation compared to manual weeding. This field experiment was conducted to identify the response of rice to tillage and planting systems, level of wheat residue retention and weed managements under rice-wheat cropping system. This study was conducted during three growing seasons of rice (June through November) in 2014, 2015 and 2016 at the National Wheat Research Program (NWRP), Rupandehi, Nepal. The experiment was conducted in a split-split plot design. Tillage and planting systems were the main plots where rice was either transplanted on puddled field managed with conventional tillage (CT) or direct seeded on zero till (ZT) soil. The level of residue retention was the sub-plot which included three levels of residue retention as whole (WR), partial (PR) or no (NR) retention. Forms of weed management were the sub-sub plots with manual weeding (MW) compared with chemical weeding (CW) through the application of bispyribac-sodium. Each treatment combination consisted of three replicated units. Averaged across the years, grain yield of rice under the CT system (4.8 t ha−1) was significantly higher than ZT (4.4 t ha−1). Increased level of wheat residue retention increased grain yield consistently in all three years. Grain yield was not influenced by systems of weed management. The following conclusions were drawn from the results: (i) rice grain yield might decrease under a direct-seeded ZT system more than the conventional system, (ii) wheat residue retained in the field can increase rice grain yield significantly, and (iii) application of bispyribac-sodium could be equally effective as manual weeding for weed control in both tillage/planting systems of rice.

Weed management effect to increase grain yield in dry direct-seeded rice

2019 ◽  
Vol 51 (1) ◽  
pp. 6
Author(s):  
Y.M. Ramesha ◽  
S.R. Anand ◽  
D. Krishnamurthy ◽  
Manjunatha Bhanuvally
Keyword(s):  
Grain Yield ◽  
Weed Management ◽  
Direct Seeded ◽  
Management Effect

scholarly journals Impact of Moisture Content and Weed Management on Direct Seeded Rice Quality

2019 ◽  
pp. 1-6
Author(s):  
Alisha Kumari ◽  
Rajan Kumar ◽  
Sweeti Kumari ◽  
Rinki Kumari Kumari
Keyword(s):  
Weed Management ◽  
Harvest Index ◽  
Management Practices ◽  
P Uptake ◽  
Research Centre ◽  
Rice Grain ◽  
Moisture Regimes ◽  
Direct Seeded ◽  
Crop Research

A field experiment was conducted during rainy (kharif) season of 2016 at Crop Research centre Pusa, Bihar to investigate the “Effect of Moisture Regimes and Weed Management on quality of Direct Seeded Rice”. The treatments consisted of three moisture regimes in main plots and five weed management practices in sub plots. The results showed that grain (3.62 t/ha) and straw yields (52.44 q/ha), harvest index (40.83%), P uptake (10.97 kg/ha) by rice grain were maximum with 3 days Disappearance of Ponded Water(DPW) which were significantly superior to 5 and 7 DPW but N (42.19 kg/ha) and P uptake (10.97 kg/ha) by rice grain, N (30.53 kg/ha), P (8.41 kg/ha) and K (74.47 kg/ha) uptake by straw were statistically at par with 5 DPW. With regard to weed management grain yield(35.62 q/ha) was maximum with W4 treatment of weed management which was significantly superior to W2, W1 and W5 but was statistically at par with W3 treatment while, straw yield (45.12 q/ha), N(41.37 and 29.75 kg/ha), P(10.72 and 8.18 kg/ha) and K(8.80 and 7.58 kg/ha) uptake by rice grain and straw were significantly superior to W1 and W5 and were comparable to W3 and W2 treatments.  In harvest index (40.97%), W4 treatment was significantly superior to all the treatments. N, P and K content in grain and straw did not vary significantly with varying moisture regimes weed management treatments.

scholarly journals Effective weed management practices to control complex weed flora in different cultivars of hybrid and high yielding varieties of rice (Oryza sativa L.)

2016 ◽  
Vol 2 ◽  
pp. 14-19
Author(s):  
Paramita Biswas ◽  
◽  
Ratikanta Ghosh ◽  
Keyword(s):  
Grain Yield ◽  
Weed Management ◽  
Management Practices ◽  
Hybrid Rice ◽  
Oryza Sativa L ◽  
Weed Flora ◽  
High Yielding Varieties ◽  
Hand Weeding ◽  
Control Complex ◽  
Plot Design

A field experiment was conducted during Summer and Kharif seasons of 2007-08 and 2008-09 at Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal, India to study the effect of hand weeding and Pretilachlor 50 EC @ 500 g a.i. ha-1 as pre-emergence on weed management of different varieties of hybrid and high yielding rice. The experiment was laid out in a split-plot design with three replications for both the years. It has been observed that Pretilachlor 50 EC @ 500 g a.i. ha-1 has a significant effect to control complex weed flora both in hybrid and high yielding varieties of rice but hand weeding twice gave the better result as expected. Among the varieties, the hybrid varieties recorded 36% and 32% more grain yield in Summer and Kharif seasons respectively than high yielding varieties (HYV). The high yielding variety 6444 (V2) showed more grain yield during Summer and Kharif seasons than that of the hybrid 6129 (V1), 97158 (V6), and 96110 (V3), respectively. Regarding weed management, hand weeding twice recorded (13% & 36%) higher grain yield during Summer than that of the chemical treatment and unweeded check, and (20% & 42%) during Kharif seasons respectively. Among the interaction, hand weeding combined with all varieties of hybrid rice recorded higher yield in comparison to other treatment combinations.

scholarly journals The use of herbicides for weed control in direct wet-seeded rice (Oryza sativa L.) in rice production regions in the Republic of Macedonia

2009 ◽  
Vol 45 (No. 3) ◽  
pp. 113-118 ◽  
Author(s):  
Z. Pacanoski ◽  
G. Glatkova
Keyword(s):  
Grain Yield ◽  
Weed Management ◽  
Agricultural Research ◽  
Oryza Sativa L ◽  
Field Trials ◽  
Cyperus Rotundus ◽  
Effective Control ◽  
Rice Grain ◽  
Weed Species ◽  
The Republic

Field trials were conducted in the Agricultural Research Institute for Rice, at two localities during 2005 and 2006. The objective of the study was to establish an appropriate weed management strategy for the effective control of weed flora in direct wet-seeded rice. Herbicide selectivity and influence on grain yield were also evaluated. The weed population in the trials was composed of 8 and 5 weed species in Kočani and Probi&scaron;tip locality, respectively. The most prevailing weeds in both localities were:Cyperus rotundus, Echinochloa crus-galli and Heteranthea limosa. The average weediness for both years was 456.8 weed stems per m<sup>2</sup> in Kočani locality and 589.0 weed stems per m<sup>2</sup> in Probi&scaron;tip locality. In both localities all herbicides controlled Cyperus rotundus, Echinochloa crus-galli and Heteranthera limosa excellently except Mefenacet 53 WP. All applied herbicides showed high selectivity to rice, no visual injuries were determined at any rates in any year and locality. Herbicidal treatments in both localities significantly increased rice grain yield in comparison with untreated control.

scholarly journals Effect of Nitrogen Sources and Weed Management Options on Weed Growth and Crop Yield of Transplant Aman Rice

2017 ◽  
Vol 20 (1) ◽  
pp. 85-97
Author(s):  
R Ghosh ◽  
M Salim ◽  
S Ahmed
Keyword(s):  
Grain Yield ◽  
Weed Management ◽  
Rice Yield ◽  
Nitrogen Sources ◽  
Management Options ◽  
Weed Biomass ◽  
Prilled Urea ◽  
Weed Growth ◽  
Panicle Number ◽  
Hand Weeding

A field study was conducted at the Agronomy research field of Bangladesh Agricultural University, Mymensingh, during the period of July to December, 2013 to evaluate the sources of nitrogen and weed management options on weed growth and rice yield. The experiment included four nitrogen sources (100% cowdung, 100% prilled urea, 100% urea super granule, 50% cowdung + 50% prilled urea) and four weed management options (weedy, application of herbicide at 3 DAT, application of herbicide at 3 DAT followed by hand weeding at 21 DAT and weed free). Sources of nitrogen and weed management options had significant effect on tiller number, biomass, SPAD value, panicle number, number of florets panicle-1, grain and straw yield, and weed biomass. The highest grain yield (5.40 t ha-1) was found in the treatment of 50% cowdung + 50% prilled urea with combination of season long weed free. Although 100% prilled urea had significantly similar grain yield to 50% cowdung + 50% prilled urea, however, across the weed management options, 100% urea super granule and 100% cowdung had 15 and 27% lower grain yield. Irrespective of the weed management options, 100% prilled urea had always higher weed biomass and 100% USG, 50% cowdung + 50% prilled urea, and 100% cowdung had 46, 35 and 19% lower weed biomass, respectively, compared with 100% prilled urea. In terms of rice yield and weed management, combined application of organic and inorganic source of nitrogen is better than only chemical or only organic source and pre-emergence herbicide followed by one hand weeding for transplanted aman rice.Bangladesh Agron. J. 2017, 20(1): 85-97

Integrated Weed Management Using Planting Pattern, Cultivar, and Herbicide in Dry-Seeded Rice in Northwest India

Weed Science ◽  
2014 ◽  
Vol 62 (2) ◽  
pp. 350-359 ◽  
Author(s):  
Gulshan Mahajan ◽  
Vikas Poonia ◽  
Bhagirath S. Chauhan
Keyword(s):  
Grain Yield ◽  
Weed Control ◽  
Weed Management ◽  
Field Experiments ◽  
Weed Suppression ◽  
Integrated Weed Management ◽  
Rice Grain ◽  
Planting Pattern ◽  
Weed Biomass ◽  
Northwest India

Field experiments were conducted in Punjab, India, in 2011 and 2012 to study the integrated effect of planting pattern [uniform rows (20-cm spacing) and paired rows (15-, 25-, and 15-cm spacing)], cultivars (PR-115 and IET-21214), and weed control treatments (nontreated control, pendimethalin 750 g ai ha−1, bispyribac-sodium 25 g ai ha−1, and pendimethalin 750 g ha−1 followed by bispyribac-sodium 25 g ha−1) on weed suppression and rice grain yield in dry-seeded rice. In the nontreated control, IET-21214 had higher grain yield than PR-115 in both planting patterns. However, such differences were not observed within the herbicide treatment. IET-21214 in paired rows, even in nontreated control, provided grain yield (4.7 t ha−1) similar to that in uniform rows coupled with the sole application of pendimethalin (4.3 t ha−1) and bispyribac-sodium (5.0 t ha−1). In uniform rows, sequential application of pendimethalin (PRE) and bispyribac-sodium (POST) provided the highest grain yield among all the weed control treatments and this treatment produced grain yield of 5.9 and 6.1 t ha−1 for PR-115 and IET-21214, respectively. Similarly, in paired rows, PR-115 in paired rows treated with sequential application of pendimethalin and bispyribac-sodium had highest grain yield (6.1 t ha−1) among all the weed control treatments. However, IET-21214 with the sole application of bispyribac-sodium produced grain yield similar to the sequential application of pendimethalin and bispyribac-sodium. At 30 days after sowing, PR-115 in paired rows coupled with pendimethalin application accrued weed biomass (10.7 g m−2) similar to the sequential application of pendimethalin and bispyribac-sodium coupled with uniform rows (8.1 g m−2). Similarly, IET-21214 with bispyribac-sodium application provided weed control similar to the sequential application of pendimethalin and bispyribac-sodium. Our study implied that grain yield of some cultivars could be improved by exploring their competitiveness through paired-row planting patterns with less use of herbicides.

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