Effect of Weed Management and Nitrogen on Weed Dynamics and Yield of Rice under Aerobic Condition

Nandan, Neha; Roy, DK; Kumari, Pooja; minder, Dhar

doi:10.20546/ijcmas.2018.704.312

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Increasing doses of nitrogen to 150 kg N ha -1 and 275 kg N ha -1 increased the biomass because nitrogen need was sufficiently met. Nandan et al (2018) reported that in paddy planted under aerobic condition the increase of N dose application also raised weed population and dry weight. In the second crop rotation, there was an increase in the species number and dry weight of weed by fertilizer application with lower dose than higher dose (Haliniarz et al 2014).…”

Section: Discussionmentioning

confidence: 98%

The diversity and physiological activities of weeds in land cultivated with various corn cultivars and fertilized with various nitrogen doses

et al. 2019

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Abstract. Rahayu M, Yudono P, Indradewa D, Hanudin E. 2019. The diversity and physiological activities of weeds in land cultivated with various corn cultivars and fertilized with various nitrogen doses. Biodiversitas 20: 622-628. Both weeds and corn have nutrient needs. Nitrogen is one of the essential elements required by weeds and corn. Each corn cultivar and weed also has different ability to absorb nitrogen. This study aimed to determine the effect of corn cultivar and nitrogen dose on the diversity and physiological activities of weeds. The research was conducted in Banguntapan, Bantul, Yogyakarta from December 2016 to May 2017. The study used a completely randomized block design with 2 factors with three replications. The first factor was corn cultivar, consisting of four cultivars (Bisi 18, NK 33, DK 95 and Sukmaraga) and the second factor was the nitrogen dose, consisting of three levels (25 kg N ha-1, 150 kg N ha-1 and 275 kg N ha-1). The data were analyzed using 5% variance analysis and continued with Duncan test at 5% level. The results showed that the most commonly found weeds were broadleaves, but the most dominant weed was a grass, namely Dactyloctenium aegyptium, except Sukmaraga with nitrogen doses of 25 kg ha-1 and 150 kg ha-1 in 4 weeks after planting (WAP). In 8 WAP, weeds that grew in land planted with all combinations of cultivars and nitrogen doses were Cyperus rotundus, Dactyloctenium aegyptium, Digitaria ciliaris, Eleusine indica, Eragrostis tenella, Amaranthus spinosus, and Richardia scabra. There were no significant differences on the nitrate reductase activity, chlorophyll content, leaf area index, and dry weight among cultivars. The treatment of 25 kg N ha-1 resulted in the lowest leaf area index and total chlorophyll content, but the highest nitrate reductase activity.

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Section: Discussionmentioning

confidence: 98%

The diversity and physiological activities of weeds in land cultivated with various corn cultivars and fertilized with various nitrogen doses

et al. 2019

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“…In contrast to poultry manure and prilled urea, USG released nitrogen slowly, ensuring that the weed had less access to it throughout its development phase and favoring the growth of the rice plant. Due to variations in nitrogen sources, Nandan et al [28] noted fluctuation in weed density and dry weight.…”

Section: Discussionmentioning

confidence: 99%

Assessment of Nitrogen Sources and Management for Sustainable Nitrogen Use in Subtropical Conditions: A Varietal Performance Study on Rice and Weed Growth

Kheya,

Salam,

Uddin

et al. 2024

Sustainability

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When growing rice, nitrogen (N) is the most vital component since it determines how much grain the crop will produce. Among the many causes of rice’s low productivity, improper nitrogen supply and inefficient nitrogen use are thought to be an important issue. In order to ensure sustainable N-management as well as to lower N-losses, it was decided to investigate how various rice cultivars react to both organic and inorganic nitrogen sources, as well as how weed infestation behavior changes with these sources in boro rice fields. Five distinct fertilizer combinations, including the control, were tested in an entirely block design that was randomized and had three replications. Each of the following sources of N: urea (prilled) at 100% of the RD (N100PU), poultry manure at 100% of the RD (N100PM), urea at 50% of the RD + poultry manure at 50% of the RD (N50PU+50PM), and urea super granule at 100% of the RD (2.7 g per 4 hills) (NUSG) were administered on BRRI dhan29, BRRI dhan88, BRRI dhan92 and BRRI dhan96, respectively. It is observed that N50PU+50PM was beneficial for weed among the nitrogen sources. But comparatively less weed invasion was noticed in the NUSG treated plots next to control specially in BRRI dhan29. With the use of NUSG, all of the varieties tested in this experimentation generated greater grain yield than they did with the use of the other nitrogen sources. When treated with NUSG, BRRI dhan29 showed a rise in grain yield around 64.34% and a greater nitrogen utilization efficiency compared to control. When benefit cost ratio (BCR) is considered, both the BCR and net income were the highest for the BRRI dhan29 variety while NUSG was employed. Finally, it can be inferred that, in comparison to other sources, the combination of BRRI dhan29 with application of NUSG appeared as the promising combination in order to increase grain production while improving nitrogen use efficiency, greatest BCR and to lessen the infestation of weeds throughout the boro season.

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Effect of Weed Management and Nitrogen on Weed Dynamics and Yield of Rice under Aerobic Condition

Cited by 2 publications

References 6 publications

The diversity and physiological activities of weeds in land cultivated with various corn cultivars and fertilized with various nitrogen doses

The diversity and physiological activities of weeds in land cultivated with various corn cultivars and fertilized with various nitrogen doses

Assessment of Nitrogen Sources and Management for Sustainable Nitrogen Use in Subtropical Conditions: A Varietal Performance Study on Rice and Weed Growth

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