通辽市气象因子对红薯产量的影响分析

Meteorological Factors in Tongliao: Effects on Sweet Potato Yield

研究通辽市气象因子对红薯种植产量的影响,旨在为通辽市农业种植结构调整提供科学依据。以红薯推广种植基地的种植资料和气象观测资料为基础数据,对气象因子与红薯产量的相关性进行分析。结果表明,积温、日照时数与红薯产量相关显著,相关系数分别为0.741和0.837,日平均气温和降水量与红薯产量未达到显著水平。除发根返青期外,其他发育期与全生育期的积温变化特征近似,相关系数均在0.788以上;日照时数年际变化与全生育期变化特征一致;仅薯块膨大期与全生育期降水量和日平均气温的年际变化相关显著,相关系数分别为0.933和0.936。热量和光照条件对产量影响相对较大,是红薯种植的限制因素,降水对产量影响不明显。

The purpose is to survey the impact of meteorological factors on the yield of sweet potato in Tongliao and provide a scientific basis for agricultural planting structure adjustment in Tongliao. Based on planting data and meteorological observation of sweet potato extension planting bases, the correlation between meteorological factors and the yield of sweet potato was analyzed. The results showed that accumulated temperature and sunshine duration had obvious correlation with the yield of sweet potato, and the correlation coefficients were0.741 and 0.837 respectively. The average daily temperature and precipitation had no significant correlation with the yield of sweet potato. Except the rooting-seedling establishment stage, the change features of accumulated temperature of the other development stages were similar with those of the whole development period. The correlation coefficients were all over 0.788. The inter-annual change feature of sunshine duration was consistent with that of the whole development period. Only the potato intamescentia stage had significant correlation with the inter-annual change features of precipitation and the average daily temperature of the whole development period, and the correlation coefficients were 0.933 and 0.936 respectively. Thermal and light conditions had relatively large effects on the yield of sweet potato, and they were the limiting factors for sweet potato planting. The effect of rainfall on sweet potato yield was not obvious.