@article{oai:repository.naro.go.jp:00001565,
 author = {松村, 修 and MATSUMURA, OSAMU and 山口, 弘道 and YAMAGUCHI, Hiromichi},
 journal = {中央農業総合研究センター研究報告, Bulletin of the National Agricultural Research Center},
 month = {Jan},
 note = {The actual condition that heading spout of paddy rice was concentrated on a short time in the large-scale farmer was cleared. The matter that such actual condition was the cause to lose the quality of brown rice was cleared. This investigation was carried out in 1999 years and 2000. The farmer which became an investigation object is the large-scale rice growing farmer in Niigata Prefecture Joetsu City. Head spout term and brown rice quality were checked about "Koshihikari"and" Kinuhikari". 1) The transplanting work was continued for about two weeks. But about 60% of the whole concentrated the heading spout term of paddy rice in 1999 on 2 days of August 2 - 3. About 70% of the whole concentrated a short term on July 29 - 30 for 2000 years. It became clear that the drastic work term concentration of paddy rice occurred in the large-scale farmer from these results. A period from the transplanting to the heading spout was high temperature both in 1999 and in 2000 . The concentration of the heading spout became more remarkable in the year of such high temperature. The short-term concentration of the heading spout was drastic for especially 2000 years, and only the width of the head spout period for 4 days could be secured while the transplanting term continued for about 2 weeks . 2) Because of concentrated heading spout, paddy fields for harvest to be delayed appeared in many. When a harvest was delayed, the occurrences of the check rice increased, and the quality of the rice fell down. When a harvest was delayed, not check rice but also sprouting rice were occurred. As for the occurrence of preharvest sprouting, terms of weather became triggers in such cases as rain. When it was cropped early, there was no change in the great brown rice appearance quality. About 40% of planted medium variety fields were estimated for decreasing in rice quality. 3) Work term dispersion is necessary in the very big large-scale rice growing farmer. But, it was difficult to disperse the heading spout skillfully with the width of the transplanting time for about two weeks. Direct seeding cultivation will be able to introduce the effective technology which delays a heading spout. And conbinational use of other methods such as delaying transplanting time or sowing time, changing seedling leaf stage, introducing various planting density are also useful., 新潟県上越地域の大規模稲作経営農家が村内３地区にまたがって作付けした水稲中生品種（２品種）について, 夏期高温年であった1999年と2000年に出穂期の集中実態を調査し, 収穫後の米の外観品質に及ぼす影響を検討した. この大規模経営では中生２品種の移植作業を２週間程度分散させて行っていたにもかかわらず, 出穂期の60～70%が２日間に集中した. このため, 成熟期を過ぎても刈り取りができずに適期外収穫せざるを得ない圃場が多数出現し, 中生品種作付圃場の約４割で胴割粒による玄米外観品質低下の可能性が認められた. 夏期高温年においては, 出穂が早まるとともに短期間に集中するため作期分散が計りにくくなり, 作付面積の大きい大規模経営で米品質の確保が困難となる実態を明らかにした.},
 pages = {25--37},
 title = {大規模稲作経営における夏期高温年の水稲出穂期の集中が米の外観品質に及ぼす影響},
 volume = {7},
 year = {2006},
 yomi = {マツムラ, オサム and ヤマグチ, ヒロミチ}
}