2000-2006年松嫩平原农田生产力时空特征与影响因素研究

Research on Farmland Productivity about Spatial-temporal Features and Influential Factors in Songnen Plain from 2000 to 2006

利用MOD17A3数据集2000-2006年年均NPP(净初级生产力)数据,对松嫩平原农田生产力时空特征与影响因素进行分析。主要结论如下:①松嫩平原旱田空间分布梯度特征明显,由西向东生产力呈递增趋势。旱田占农田总面积的90.17%,低、中、高产旱田面积分别为93170km2、23963km2和18866km2,占旱田总面积比例分别为68.51%、17.62%和13.87%。低、中、高产水田面积分别为1567km2、12171km2和1091km2,占水田总面积比例分别为10.57%、82.08%和7.35%。②2000-2006年,松嫩平原旱田和水田NPP变化趋势基本一致,总体均呈微弱的下降趋势,2000-2003年和2004-2006年为两个相似的NPP增加阶段。③气温与旱田和水田均呈极微弱的负相关关系,对旱田和水田生长存在微弱的抑制作用。降水与旱田和水田平均NPP相关系数分别为0.371和0.285,对旱田和水田生长的影响比气温明显,是影响松嫩平原农作物生产的主要因素。

Studied on farmland productivity about spatial-temporal features and influential factors in Songnen Plain,using annual mean NPP data of MOD17A3 data set from 2000 to 2006of.Main conclusions as followed：①Spatial distribution of dry farmland productivity is obviously in Songnen Plain,with the increasing trend from west to east.The area of low-yield,mid-yield and high-yield dry farmland is 23 963 km2,93 170 km2 and 18 866 km2 respectively,and the proportion is 17.62%,68.51% and 13.87%.The area of three levels paddy farmland is 1567 km2,12 171 km2 and 1091 km2 respectively,and proportion 10.57%,82.08% and 7.35%.②Dry farmland and paddy farmland showed the same slight downward trend basically,and with the two similar increasing phases,2000 to 2003 and 2004 to 2006 in Songnen Plain.③The correlations between temperature and dry farmland as well as paddy farmland were ultra-weak negatively,and with a slight inhibition for dry farmland and paddy farmland growth in Songnen Plain.The precipitation is more significant than temperature for the growth on dry farmland and paddy farmland.