Abstract
An early rice field experiment was carried out to study the effects of combined application of control release nitrogen fertilizer or urea and Chinese milk vetch on yield,agronomic characters,dry matter accumulation and nitrogen uptake of rice plant and soil nitrogen nutrient.The results indicated that combined application of controlled release nitrogen fertilizer or urea and Chinese milk vetch could increase yield of early rice by reducing nitrogen application by 20% and 40%,respectively.Compared with 100% urea treatment,the grain yield of early rice in the treatment of 80% urea with Chinese milk vetch and of 60% controlled release nitrogen fertilizer with Chinese milk vetch were respectively increased by 7.5% and 6.7%,but the yield of rice straw in two treatments lowered.The increases of productive ear number per unit area,1000-grain weight and filled grain number per panicle were the main reasons for the high yield of early rice.In treatment with 100% urea,early rice grew very well at early stage,while the growth of early rice was mainly enhanced at middle and late stages in treatments with combined application of reducing urea or controlled release nitrogen fertilizer and Chinese milk vetch.In treatment with 100% urea,the accumulation of dry matter,total nitrogen content and nitrogen nutrient accumulation of rice plant were high in the early plant growth stage.In the treatment of 80% urea or 60% controlled release nitrogen fertilizer with Chinese milk vetch,nitrogen nutrient was supplied continuously at mid-late rice growth stage.Combined application of urea or controlled release nitrogen fertilizer and Chinese milk vetch helped improve nitrogen use efficiency by reducing the amount of nitrogen fertilizer accordingly.Nitrogen fertilizer utilization efficiency,nitrogen agronomic efficiency,nitrogen partial productivity and nitrogen harvest index in the treatment of 60%controlled release nitrogen fertilizer with Chinese milk vetch were the highest in all treatments.More nitrogen nutrients were released when controlled release nitrogen fertilizer with Chinese milk vetch was used at mid-late rice growth stage,which increased soil alkali-hydrolyzable nitrogen at mid-late rice growth stage.
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Claims 11
Claim · model-written summary
80% urea with Chinese milk vetch increased early rice grain yield by 7.5% versus 100% urea.
- Taxon
- rice
Oryza sativae0 - Treatment
- 80% urea with Chinese milk vetche0
- Outcome
- grain yield of early ricee0
- Direction
- increasede0
- Value
- 7.5%e0
- Comparator
- 100% urea treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with 100% urea treatment,the grain yield of early rice in the treatment of 80% urea with Chinese milk vetch and of 60% controlled release nitrogen fertilizer with Chinese milk vetch were respectively increased by 7.5% and 6.7%,but the yield of rice straw in two treatments lowered.”
Claim · model-written summary
60% controlled release nitrogen fertilizer with Chinese milk vetch increased early rice grain yield by 6.7% versus 100% urea.
- Taxon
- riceOryza sativae0
- Treatment
- 60% controlled release nitrogen fertilizer with Chinese milk vetche0
- Outcome
- grain yield of early ricee0
- Direction
- increasede0
- Value
- 6.7%e0
- Comparator
- 100% urea treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with 100% urea treatment,the grain yield of early rice in the treatment of 80% urea with Chinese milk vetch and of 60% controlled release nitrogen fertilizer with Chinese milk vetch were respectively increased by 7.5% and 6.7%,but the yield of rice straw in two treatments lowered.”
Claim · model-written summary
80% urea with Chinese milk vetch lowered rice straw yield versus 100% urea.
- Taxon
- riceOryza sativae0
- Treatment
- 80% urea with Chinese milk vetche0
- Outcome
- yield of rice strawe0
- Direction
- lowerede0
- Comparator
- 100% urea treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with 100% urea treatment,the grain yield of early rice in the treatment of 80% urea with Chinese milk vetch and of 60% controlled release nitrogen fertilizer with Chinese milk vetch were respectively increased by 7.5% and 6.7%,but the yield of rice straw in two treatments lowered.”
Claim · model-written summary
60% controlled release nitrogen fertilizer with Chinese milk vetch lowered rice straw yield versus 100% urea.
- Taxon
- riceOryza sativae0
- Treatment
- 60% controlled release nitrogen fertilizer with Chinese milk vetche0
- Outcome
- yield of rice strawe0
- Direction
- lowerede0
- Comparator
- 100% urea treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with 100% urea treatment,the grain yield of early rice in the treatment of 80% urea with Chinese milk vetch and of 60% controlled release nitrogen fertilizer with Chinese milk vetch were respectively increased by 7.5% and 6.7%,but the yield of rice straw in two treatments lowered.”
Claim · model-written summary
Higher productive ears, grain weight and filled grains contributed to early rice yield.
- Taxon
- riceOryza sativae0
- Outcome
- high yield of early ricee0
- Qualifier
- increases of productive ear number per unit area,1000-grain weight and filled grain number per paniclee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increases of productive ear number per unit area,1000-grain weight and filled grain number per panicle were the main reasons for the high yield of early rice.”
Claim · model-written summary
Early rice growth was enhanced at middle and late stages with reduced urea or controlled release nitrogen fertilizer plus milk vetch.
- Taxon
- riceOryza sativae0
- Organ / stage
- middle and late stagese0
- Treatment
- combined application of reducing urea or controlled release nitrogen fertilizer and Chinese milk vetche0
- Outcome
- growth of early ricee0
- Direction
- enhancede0
- Comparator
- 100% ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In treatment with 100% urea,early rice grew very well at early stage,while the growth of early rice was mainly enhanced at middle and late stages in treatments with combined application of reducing urea or controlled release nitrogen fertilizer and Chinese milk vetch.”
Claim · model-written summary
With 100% urea, early rice had high dry matter and nitrogen accumulation at the early stage.
- Taxon
- riceOryza sativae0
- Organ / stage
- early plant growth stagee0
- Treatment
- 100% ureae0
- Outcome
- accumulation of dry matter,total nitrogen content and nitrogen nutrient accumulation of rice plante0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In treatment with 100% urea,the accumulation of dry matter,total nitrogen content and nitrogen nutrient accumulation of rice plant were high in the early plant growth stage.”
Claim · model-written summary
Reduced fertilizer with milk vetch supplied nitrogen continuously at mid-late rice growth.
- Taxon
- riceOryza sativae0
- Organ / stage
- mid-late rice growth stagee0
- Treatment
- 80% urea or 60% controlled release nitrogen fertilizer with Chinese milk vetche0
- Outcome
- nitrogen nutrient was supplied continuouslye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the treatment of 80% urea or 60% controlled release nitrogen fertilizer with Chinese milk vetch,nitrogen nutrient was supplied continuously at mid-late rice growth stage.”
Claim · model-written summary
Combined fertilizer and milk vetch improved nitrogen use efficiency with reduced fertilizer.
- Taxon
- riceOryza sativat0
- Treatment
- Combined application of urea or controlled release nitrogen fertilizer and Chinese milk vetche0
- Outcome
- nitrogen use efficiencye0
- Direction
- improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combined application of urea or controlled release nitrogen fertilizer and Chinese milk vetch helped improve nitrogen use efficiency by reducing the amount of nitrogen fertilizer accordingly.”
t0“Rice”
Claim · model-written summary
The 60% controlled release fertilizer plus milk vetch treatment had the highest nitrogen efficiency indices.
- Taxon
- riceOryza sativat0
- Treatment
- 60%controlled release nitrogen fertilizer with Chinese milk vetche0
- Outcome
- Nitrogen fertilizer utilization efficiency,nitrogen agronomic efficiency,nitrogen partial productivity and nitrogen harvest indexe0
- Direction
- higheste0
- Comparator
- all treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fertilizer utilization efficiency,nitrogen agronomic efficiency,nitrogen partial productivity and nitrogen harvest index in the treatment of 60%controlled release nitrogen fertilizer with Chinese milk vetch were the highest in all treatments.”
t0“Rice”
Claim · model-written summary
Controlled release fertilizer plus milk vetch increased soil alkali-hydrolyzable nitrogen at mid-late rice growth.
- Taxon
- riceOryza sativae0
- Organ / stage
- mid-late rice growth stagee0
- Treatment
- controlled release nitrogen fertilizer with Chinese milk vetche0
- Outcome
- soil alkali-hydrolyzable nitrogene0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More nitrogen nutrients were released when controlled release nitrogen fertilizer with Chinese milk vetch was used at mid-late rice growth stage,which increased soil alkali-hydrolyzable nitrogen at mid-late rice growth stage.”
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