关键词: 水稻, 无芒稗, 水层, 密度, 干扰控制

Abstract: Drought is the most important agricultural meteorological disaster in Henan Province. Based on the relevant data of agriculture, water conservancy, and soil since the 1990s, an index system was built for the evaluation of the comprehensive agricultural drought-resistant capability of the Province, and a comprehensive index was used for the regionalization of the capability. The ratio of irrigated area to cultivated area, the number of electromechanical wells per each effective irrigational unit, the coefficient of soil available retaining water, and the coefficient of agricultural machine’s power were the available indices for the evaluation of the comprehensive capability of agricultural drought-resistance. According to these indices, the comprehensive capability of agricultural drought-resistance in the whole area of Henan was classified into three classes, i.e., high, moderate, and low. The high capability region included most middle and north areas of Henan; moderate capability region distributed more scattered, including low hilly regions in west and middle Henan, east region of Pingdingshan, southwest region of Zhumadian and Xinyang, the region from east Kaifeng to Shangqiu, and most regions of Linzhou and Huixian; while low capability region could be further classified into two sub-regions, one included Sanmenxia and the west and middle Luoyang and Nanyang, and the other included the east and middle Xinyang.

Key words: Rice, Barnyardgrass, Water irrigation, Rice plant density, Interference