干旱地区农业研究Issue(6)：53-56,4.
黑龙江省大豆作物系数的确定
Estimation of crop coefficients for soybean in Heilongjiang province
摘要
Abstract
Crop coefficient is an important parameter for calculating crop water requirements and reasonable distri-bution of irrigation water and water resources .According to the observated records from 1991 to 2011 in 10 typical agri-cultural meteorological stations of Heilongjiang province ,the average soybean growth stages were determined by using the statistical method ,the crop coefficients of soybean were estimated by using the FAO recommended Penman -Monteith Formula and water balance equation in root zoon ,and the variable rule of crop coefficient of soybean was further ana-lyzed .The results indicated that:In recent 20 years ,the sowing date of soybean was delayed average 5 days ,the harvest date was delayed 10 days ,and the average soybean growing season was from first day of May to last day of September . The soybean crop coefficient displayed unimodal distribution in whole growing season .The average crop coefficient in whole growing season was 0 .61 ,the highest value was 0 .96 at podding stage ,the second was 0 .75 at flowering stage , the lowest value was 0 .32 at seedling and maturing stages .The crop coefficients in three leaves stage ,branching stage and poddring stage were 0 .60 ,0 .62 and 0 .71 ,respectively .The water sensitive period was podding stage and flowering stage .关键词
大豆/作物系数/生育期/作物系数变化规律/Penman-Monteith公式/根层水分平衡法/黑龙江省Key words
soybean/crop coefficient/growth stage/variable rule of crop coefficient/Penman-Monteith Formula/water balance equation in root zoon/Heilongjiang province分类
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杨晓娟,刘园,白薇,刘布春..黑龙江省大豆作物系数的确定[J].干旱地区农业研究,2014,(6):53-56,4.基金项目
农业部公益性行业（农业）科研专项“主要农作物抗御季节性干旱技术研究与示范”（201203031）；国家级公益性科研院所基本科研业务费“东北地区主要作物天气指数保险和风险区划研究” （）
