摘要
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.
出处
《农业系统科学与综合研究》
CSCD
2010年第4期468-474,共7页
System Sciemces and Comprehensive Studies In Agriculture
基金
中国科学院知识创新工程重要方向项目(KZCX2-YW-341)
黄土高原土壤侵蚀与旱地农业国家重点实验室基金课题(10501-233)
国家自然科学基金项目(40871187)