Abstract
Rice (Oryza sativa L.) is one of the most important staple food crops worldwide. Nitrogen (N) is the most important nutrient in irrigated rice cultivation. Current high yields of irrigated rice are often associated with applications of higher doses of fertilizer N, as nearly 30-40 percent of applied nitrogen is actually utilized by the crop; even with the best agronomic practices. It has always been a problem to raise the utilization rate of the rice plant and to increase efficiency of absorbed nitrogen for grain production. Hence, a field experiment was conducted during kharif 2017 at the Research cum Instructional Farm, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G) to study the impact of use of urea briquettes in combination with organics in irrigated rice cultivation system with eleven treatments each replicated four times. Rice variety Rajeshwari was taken as test crop under irrigated condition. The experiment laidout in randomized complete block design comprised of four treatments involving application of urea briquettes, another four treatments involving application of urea and rest three treatments involving application of briquettes of urea + FYM, urea + vermicompost and urea + neem cake as source of nitrogen along with varying doses of phosphorus and potassium. The influence of the different levels and sources of N on nitrogen, phosphorus and potash use efficiency under different treatments were studied. The results revealed that the addition of organics in urea briquettes and deep placement of briquettes exhibited higher nitrogen, phosphorus and potassium use efficiency which might be attributed to slow release of nitrogen, thus reducing the losses and thereby higher nutrients uptake and ultimately higher yield. Nitrogen losses in irrigated rice were significantly influenced by the treatments. The concentration of nitrates and ammonia found in leachates in treatments involving urea+organics briquettes were found significantly lower compared to rest treatments. Application of urea briquettes significantly influenced the available N,P,K in soil at harvest. Overall, urea+FYM briquette application among different sources of fertilizer nitrogen was found most suitable for irrigated rice cultivation system and it also showed higher nitrogen use efficiency as compared to recommended dose of fertilizers.
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Claims 7
Claim · model-written summary
Adding organics to urea briquettes and deep placement of briquettes gave higher nitrogen, phosphorus and potassium use efficiency in irrigated rice.
- Taxon
- Rice
Oryza sativat0 - Treatment
- addition of organics in urea briquettes and deep placement of briquettese0
- Outcome
- nitrogen, phosphorus and potassium use efficiencye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the addition of organics in urea briquettes and deep placement of briquettes exhibited higher nitrogen, phosphorus and potassium use efficiency”
t0“Irrigated Rice”
Claim · model-written summary
Nitrogen losses in irrigated rice were significantly influenced by the treatments.
- Taxon
- riceOryza sativae0
- Treatment
- the treatmentse0
- Outcome
- Nitrogen lossese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen losses in irrigated rice were significantly influenced by the treatments”
Claim · model-written summary
Nitrate and ammonia concentrations in leachates were significantly lower with urea plus organics briquettes than with the other treatments.
- Taxon
- RiceOryza sativat0
- Treatment
- urea+organics briquettese0
- Outcome
- concentration of nitrates and ammonia found in leachatese0
- Direction
- lowere0
- Comparator
- rest treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concentration of nitrates and ammonia found in leachates in treatments involving urea+organics briquettes were found significantly lower compared to rest treatments”
t0“Irrigated Rice”
Claim · model-written summary
Application of urea briquettes significantly influenced available N, P and K in soil at harvest.
- Taxon
- RiceOryza sativat0
- Treatment
- Application of urea briquettese0
- Outcome
- available N,P,K in soile0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of urea briquettes significantly influenced the available N,P,K in soil at harvest”
t0“Irrigated Rice”
Claim · model-written summary
Urea plus FYM briquette application was the most suitable nitrogen source for the irrigated rice cultivation system.
- Taxon
- RiceOryza sativat0
- Outcome
- most suitablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“urea+FYM briquette application among different sources of fertilizer nitrogen was found most suitable for irrigated rice cultivation system”
t0“Irrigated Rice”
Claim · model-written summary
Urea plus FYM briquette application showed higher nitrogen use efficiency than the recommended dose of fertilizers.
- Taxon
- RiceOryza sativat0
- Treatment
- urea+FYM briquette applicatione0
- Outcome
- nitrogen use efficiencye1
- Direction
- highere1
- Comparator
- recommended dose of fertilizerse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“urea+FYM briquette application”
e1“it also showed higher nitrogen use efficiency as compared to recommended dose of fertilizers”
t0“Irrigated Rice”
Claim · model-written summary
The higher nutrient use efficiency was attributed, as a possibility, to slow release of nitrogen reducing losses and giving higher nutrient uptake and yield.
- Taxon
- RiceOryza sativat0
- Outcome
- nutrients uptakee0
- Qualifier
- slow release of nitrogene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which might be attributed to slow release of nitrogen, thus reducing the losses and thereby higher nutrients uptake and ultimately higher yield”
t0“Irrigated Rice”
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