【摘要】 采用地面调查与"3S"技术相结合的方法,应用MODIS-NDVI对四川省"莎草Cyperus microiria、杂类草草地"生产力进行监测,对草原植被与生态状况及其变化做出评价。结果表明:NDVI估产模型相关系数r=0.640 3,F检验达到了极显著水平。利用模型计算出2006、2007年"莎草、杂类草草地"可食牧草鲜草产量分别为188.6亿、203.8亿kg,平均产量3 229.5、3 489.00 kg/hm2;植被盖度分别为79.68%、81.29%;植被高度分别为17.08、16.03 cm;可食率分别为76.1%、75.0%。生产力2007年较2006年增加6.1%,其余指标年际变化不明显。更多还原

【Abstract】 The productivity of sedge and forbs grasslands in Sichuan Province was monitored by using both filed investigation and 3S technologies based on MODIS-NDVI.The result showed that the correlation coefficient of yield estimating mathematical model was 0.640 3(P<0.05).The estimated total editable fresh yields of sedge and forbs grasslands were 1 886 and 2 038 million tons,the average yields were 3 229.5 kg/hm2 and 3 489.0 kg/hm2,the vegetation coverage were 79.68% and 81.29%,the vegetation height was 7.08 cm and 16.03 cm,the edible proportion of grasses was 76.1% and 75.0% in 2006 and 2007 respectively.The yield in 2007 was 6.1% higher than that in 2006 and the yearly variation of rest parameters was not significant.更多还原