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- Title
减氮增密对籼粳杂交稻产量和稻米品质的影响.
- Authors
张 凯; 陈明睿; 刘秋员
- Abstract
The indica‑japonica hybrid rice varieties Yongyou 2640 and Yongyou 15 were used as materials, and the effects of reduced nitrogen application rate with increased density [2 seedlings per hole under conventional nitrogen fertilizer level (pure N 300 kg/ha) (T1), 2 seedlings (T2), 3 seedlings (T3), 4 seedlings (T4), 5 seedlings (T5) per hole under nitrogen reduction level (pure N 225 kg/ha) ] on yield and quality of rice were studied, so as to provide technical support for green high‑yield cultivation of indica‑japonica hybrid rice. The results showed that the yield of each nitrogen reduction treatment of two rice varieties first increased and then decreased with the increase of density, the yield of T3 treatment was the highest, which significantly increased by 7. 03% (Yongyou 2640) and 6. 59% (Yongyou 15) compared with T1 treatment, but the yields of the other nitrogen reduction treatments were significantly lower than that of T1 treatment. T3 treatment had the highest effective panicle number and grain number per panicle, so got the highest yield. In terms of rice quality, brown rice rate, milled rice rate, head milled rice rate, protein and its components contents, amylose content, amylopectin content, total starch content, hardness and final viscosity of nitrogen reduction treatments of two rice varieties generally decreased with the increase of density, and were lower than those of T1 treatment, while the chalkiness rate, chalkiness degree, taste value and setback value increased with the increase of density, and were higher than those of T1 treatment. In summary, for indica‑japonica hybrid rice, high yield and quality can be achieved with hole and row spacings of 12 cm and 30 cm and 3 seedlings per hole under the condition of 225 kg/ha nitrogen.
- Subjects
HYBRID rice; NITROGEN; DENSITY
- Publication
Journal of Henan Agricultural Sciences, 2023, Vol 52, Issue 10, p14
- ISSN
1004-3268
- Publication type
Article
- DOI
10.15933/j.cnki.1004-3268.2023.10.002