抗旱水稻品种的筛选及综合评价

为筛选适宜冀东滨海稻区种植的耐旱水稻新品种，通过水作和旱作栽培模式下与作物生产密切相关的农艺性状指标（如生育期、产量性状指标等）的变化，探讨了21个水稻稳定品系的抗旱性。结果表明，栽培稻旱作较水作生育期延长、株高降低、穗长缩短，产量降低，影响旱作水稻产量的主要因子是每穗粒数。通过抗旱力指数法和农艺性状的综合评价，认为稳定品系wd1、wd11、wd10、wd12属于中熟品种，产量稳定，综合性状优，是适宜旱作的稳定品系

Selection and Comprehensive Evaluation of Drought-Resistant Rice Variety

In order to select drought-resistant rice variety suiting to grow in Hebei province, drought resistance of 21 rice stable varieties was studied by change of the agronomic characters of rice varieties cultivated in the paddy and upland field, which was correlative with crop production. The result indicated that the longer growth date, the shorter panicle length, the lower plant height and the lower yielding capacity of rice varieties were found under the dry cultivation relative to paddy cultivation. Principal factor which influenced rice yield under the dry cultivation condition was grain number per panicle. By drought resistance index and comprehensive evaluation of agronomic character, the result showed rice varieties wd1, wd10, wd11 and wd12 were medium varieties, which were suitable for dry cultivation by their stable yield, superior synthesis characters.