摘要
以选取的河北省山前平原区和黑龙港区的6个县(市)为样点,通过统计各地1973—2007年35年气象资料,分析了与灌溉决策有关的气候条件和冬前应变灌溉方案。结果表明:河北省小麦玉米两熟产区1/3年份的降水可满足播种出苗需要,这时趁墒播种应为首选。其他年份应尽量采取灌足底墒水播种的方式。若因农时紧张需适时抢播,播后应马上灌"蒙头水"。由于冬季气候变暖,越冬前的灌水应以保证越冬期和返青至拔节期水分供应为主,防御冻害为辅,应通过合理的冬前灌溉保证春季第一次肥水时间能推迟到拔节前后。
By selecting 6 counties in Hebei province as samples, and calculating 35 years （1973- 2007） meteorological data of each county, the climatic conditions related to irrigation decision-making and alternative irrigating strategies prior to the wheat over-wintering period were analyzed. The results indicated that precipitation in 1/3 years satisfied the needs for sowing and seed sprouting, and it should be the first choice to take the chance of high soil water content and sowing seeds in these years. Farmland should be irrigated fully before sowing seeds in other years, unless the farming season was intense, sowing against time was necessary. If it was the latter, irrigation must be done immediately after sowing. Because of the winter climate warming, it was more important for irrigating before wheat overwinter to guarantee soil water content in the period from overwintering to jointing than avoid freezing of wheat. The first time to fertilize and irrigate in spring should be postponed to the jointing stage through reasonable irrigation before winter.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2009年第3期1-4,共4页
Journal of Hebei Agricultural University
基金
国家"十一五"科技支撑计划重大项目课题"黄淮海中北部平原小麦玉米两熟丰产高效技术集成研究与示范"(2006BAD02A08)
关键词
小麦
冬前
灌溉
气候分析
wheat
before overwinter
irrigation
climate analysis
