土壤水分境況對土壤及水稻生育之影響
Other Title
Soil and Growth of Rice as Affected by Soil Moisture Regime
Journal
農業氣象災害調查與防護技術
Pages
153-166
ISBN
957-99870-7-6
Date Issued
2003-10
Date
2003-10
Author(s)
李健捀
陳世雄
Jiann-Feng Lee
Shih-Shiung Chen
Abstract
國內育成之水稻推廣品種，於水稻生育初期耐旱性低，稉稻品種耐早性又較秈稻品種為差。水稻生育初期仍以湛水管理，對於養分的有效性及吸收利用效益較大。但二期作應提早於移植後第29天進行晒田管理，以改善不良的土壤環境障礙。幼穗形成期間及抽穗期間，應給予充足之灌溉水。在穀粒充實期，適當減少灌溉水，可以得到較高的產量。提高土壤水分張力，亦有降低白米中粗蛋白質含量之效果。因此水稻於生育後期，當水稻植株有累積過量氮素時，可利用適當的排水管理，以降低水稻對氮素的吸收，對稻米品質將有顯著的提升效果。
Rice varieties bred in Taiwan had lower tolerance to drought in the vegetative growth stage. Generally drought tolerance in Japonica rice is lower than that of Indica rice. The advantages of submerged condition in the vegetative growth are that it provides more available soil nutrient and higher uptake efficiency. For rice grown in the second cropping season, it is suggested to practice soil-drying cycle at 29 days after transplanting to improve unfavorable soil environment. A depth of 5-7 cm irrigation is required in both the primary panicle formation stage and heading stage. During grain filling stage, results from field experiments showed that reduced irrigation water may give higher grain yield. The high soil moisture tension during grain filling stage reduced crude protein content of rice grain. When rice plant accumulated more-than-enough nitrogen content during grain filling stage, high soil moisture tension can reduce nitrogen uptake in rice and thus induce positive effect to grain quality.
Event(s)
農業氣象災害調查與防護技術研討會
Subjects
水稻
土壤
土壤水分境況
產量
稻米品質
Rice
Soil
Soil moisture regime
Yield
Rice quality
Publisher
農業試驗所、中華農業氣象學會
Type
conference paper
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農業氣像災害調查與防護技術p153-166.pdf
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