摘要
为了研究不同播期马铃薯干物质的积累情况,运用数理统计和作物生长模型等方法,对2008年4—6月宁夏西吉10个不同播期的马铃薯干物质和气象因子数据进行处理分析。结果表明,马铃薯株茎干物质的积累过程为S型曲线,并分别与积温、累积降水、日照时数3个气象因子之间有显著的相关性,块茎干物质与气象因子的相关性不明显;随着播期的推迟,产量有增长趋势,4、5月播期的增长趋势不明显,波动也不大,6月产量增幅较大;作物生长模型模拟的产量偏大,随着播期的推迟生育期明显缩短,产量有增加的趋势,但是趋势很平缓。
In order to study accumulation conditions of the dry matter of potatoes in different sowing dates,this paper processed and analyzed the data of the dry matter and meteorological factor in different sowing dates based on the mathematical statistics and crop growth model.The results showed that： the cumulative process of the dry matter of the potato stem presented an S-curve,and had significant correlation with accumulated temperature,accumulated precipitation and sunshine duration except for the meteorological factor.The output grew as the sowing date defers.In particular,the growth in April and May was not as strong as in June.The output of the crop growth model was a little bit higher.In addition,the growth period shortens greatly with a late sowing date while the growth rate slowed down.
出处
《中国农学通报》
CSCD
2012年第9期127-132,共6页
Chinese Agricultural Science Bulletin
基金
国家自然科学基金项目"气候变化背景下黄土高原粉用马铃薯高产优质的气候敏感性研究"(40765003)
国家"十一五"科技支撑计划重大项目"全球环境变化应对技术研究与示范"(2007BAC03A02)
关键词
干物质
气象因子
作物生长模型
dry matter
meteorological factor
crop growth model
