摘要
为研究商洛市小麦产量与降水量之间的相关性,找出影响商洛市小麦产量的气象因子,确定小麦高产所需的最适宜降水量,人为调节小麦关键生育期降水指标,提高商洛市小麦产量,运用5 a滑动平均法和皮尔逊相关系数法分析商洛市冬小麦产量与降水量之间的关系。结果表明,商洛市冬小麦气象产量与全生育期降水量相关系数为0.458(通过0.01水平显著性检验),其中4月降水量与小麦产量相关系数最高,可建立冬小麦产量与降水量线性回归模型,确定降水和产量之间的定量关系。小麦产量在2475~2640 kg/hm^(2)的年份,对应生育期降水量在250~350 mm之间,降水量达350 mm以上时小麦产量下降。产量2475 kg/hm^(2)以上高产年份对应的4月降水量一般在45~65 mm之间。
In order to study the correlation between wheat yield and precipitation in Shangluo City,find out the meteorological factors that affect the wheat yield in Shangluo City,determine the most appropriate precipitation required for wheat high yield,and artificially adjust the precipitation index of wheat during the key growth period and improve wheat yield in Shangluo City,5 a sliding average method and Pearson correlation coefficient method were used to analyze the relationship between winter wheat yield and precipitation in Shangluo City.The results showed that the correlation coefficient between meteorological yield of winter wheat and precipitation during the whole growth period in Shangluo City was 0.458(passing 0.01 significance test),and the correlation coefficient between precipitation and wheat yield in April was the highest.A linear regression model between winter wheat yield and precipitation could be established to determine the quantitative relationship between precipitation and yield.When the wheat yield was 2475-2640 kg/hm2,the precipitation during the corresponding growth period was 250-350 mm.The wheat yield decreased when precipitation was above 350 mm.The April precipitation corresponding to high yield(yield was above 2475 kg/hm2)years was generally 45-65 mm.
作者
胡晓黎
赵小宁
雷蕾
董宇轩
李晓静
HU Xiaoli;ZHAO Xiaoning;LEI Lei;DONG Yuxuan;LI Xiaojing(Meteorological Bureau of Shangluo City,Shangluo Shaanxi 726000)
出处
《现代农业科技》
2023年第20期156-159,共4页
Modern Agricultural Science and Technology
关键词
冬小麦
降水量
产量
相关性
陕西商洛
winter wheat
precipitation
yield
correlation
Shangluo Shaanxi
