关键词: 旱稻, 旱稻, 渗入系, 抽穗期, 根系性状, QTL定位

Abstract:

Conservation tillage is a new technology for increasing crop yield in arid-sandy areas, which was used to planting winter wheat was essential to increasing local soil productivity. The experiment was conducted using no-tillage, film-mulching and conventional tillage During 2003 to 2007, and soil temperature, soil water content, soil bulk density, crop yield, water use efficiency and economic benefits under different tillage were investigated. The results showed that local place was suitable for planting winter wheat. compared to CT, NT and PM soil temperature improved 0.35℃and 2.27℃,and increased the water content by16.5% and 35.9%. At surface soil 0-20cm layer the soil bulk density decreased by1% in NT before planting and 5% after harvesting. But increased at 20-40cm. PM also increased the soil surface bulk density. Water use efficiency increased by 42.1% and 78.3% in NT and PM, and by20.5% and72.2% for yield. NT reduced the total input, and so it had highest economic benefit. Thus, it is beneficial to implement conservation tillage on winter wheat for avoiding soil surface naked in winter and spring, and improving the local planting configuration.