Abstract
Nutrients and weeds are two important factors that influence the productivity of the rice. Azolla and BGA have ability to replace N fertilizers by 25% of the total crop requirement through biological N fixation. The Azolla covert may significantly inhibit weed infestation without harming the rice yield. A 2-year field experiment was conducted to study the influence of nitrogen (N) levels and weed management practices (WMP) on nutrient content, uptake, and grain quality of wetland rice during Kharif 2018 and 2019. The experiment was laid out in a split plot design having five nitrogen levels viz. control, 60, 90 &120 kg N ha -1 through inorganic source and 60 kg N ha -1 as farmyard manure (FYM) in main plots and four weed management practices viz. Azolla (2 t ha -1 ), blue-green algae (BGA), two-hand weeding (2HW), and weedy in sub plots replicated thrice. Results indicated that the use of more N (120 kg N ha -1 ) recorded the highest N content in rice grain and straw while phosphorous (P) & potassium (K) content was noticed higher with the use of 60 kg N ha -1 as FYM. Higher nitrogen application (120 kg N ha -1 ) improved NPK uptake by grain and straw. Dual cropping of Azolla @ 2 t ha -1 leads to maximum nutrient (N, P, K) content and uptake by rice grain and straw. Quality parameters viz. kernel length & breadth before and after cooking were significantly influenced by N levels and maximum values were noted with the use of 120 kg N ha -1 . The WMP fails to exhibit any significant effect on the quality parameters of rice viz. kernel length & breadth before and after cooking. Length: breadth ratio before and after cooking, elongation ratio, and expansion ratio were also noted unaffected by N levels and WMP during the study period.
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Claims 7
Claim · model-written summary
The 120 kg N/ha treatment gave the highest N content in rice grain and straw.
- Taxon
- Oryza sativa
Oryza sativat0 - Organ / stage
- rice grain and strawe1
- Treatment
- 120 kg N ha -1e1
- Outcome
- N contente1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa”
e1“the use of more N (120 kg N ha -1 ) recorded the highest N content in rice grain and straw”
Claim · model-written summary
The 60 kg N/ha as FYM treatment gave higher phosphorus and potassium content in rice.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- 60 kg N ha -1 as FYMe1
- Outcome
- phosphorous (P) & potassium (K) contente1
- Direction
- highere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa”
e1“phosphorous (P) & potassium (K) content was noticed higher with the use of 60 kg N ha -1 as FYM”
Claim · model-written summary
Higher nitrogen application (120 kg N/ha) improved NPK uptake by rice grain and straw.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- Higher nitrogen applicatione1
- Outcome
- NPK uptake by grain and strawe1
- Direction
- improvede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa”
e1“Higher nitrogen application (120 kg N ha -1 ) improved NPK uptake by grain and straw”
Claim · model-written summary
Dual cropping of Azolla at 2 t/ha gave maximum nutrient (N, P, K) content and uptake by rice grain and straw.
- Taxon
- Oryza sativaOryza sativat0
- Organ / stage
- rice grain and strawe1
- Treatment
- Azolla @ 2 t ha -1e1
- Outcome
- nutrient (N, P, K) content and uptakee1
- Direction
- maximume1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa”
e1“Dual cropping of Azolla @ 2 t ha -1 leads to maximum nutrient (N, P, K) content and uptake by rice grain and straw”
Claim · model-written summary
Kernel length and breadth before and after cooking reached maximum values at 120 kg N/ha.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- 120 kg N ha -1e1
- Outcome
- kernel length & breadth before and after cookinge1
- Direction
- maximume1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa”
e1“Quality parameters viz. kernel length & breadth before and after cooking were significantly influenced by N levels and maximum values were noted with the use of 120 kg N ha -1”
Claim · model-written summary
Weed management practices had no significant effect on kernel length and breadth before and after cooking.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- WMPe1
- Outcome
- kernel length & breadth before and after cookinge1
- Direction
- fails to exhibit any significant effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa”
e1“The WMP fails to exhibit any significant effect on the quality parameters of rice viz. kernel length & breadth before and after cooking”
Claim · model-written summary
Length:breadth ratio, elongation ratio and expansion ratio were unaffected by N levels and weed management practices.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- N levels and WMPe1
- Outcome
- Length: breadth ratio before and after cooking, elongation ratio, and expansion ratioe1
- Direction
- unaffectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa”
e1“Length: breadth ratio before and after cooking, elongation ratio, and expansion ratio were also noted unaffected by N levels and WMP during the study period”
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