使用NOAA／AVHRR资料进行牧草产量及载畜量监测的方法研究

Researches on Monitoring Method of Grassland Biomass Yield and Carrying Capacity by Using NOA A/AVHRR Information

本文详述了如何利用ＮＯＡＡ／ＡＶＨＲＲ资料进行草地产草量和载畜量监测的方法性研究。针对ＮＯＡＡ／ＡＶＨＲＲ资料和我国草地的特点，提出为消除植被指数资料误差，建立平均植被指数影象；推导出新的修正后的归一化植被指数公式；提出“面”与“面”相关的概念，建立平均植被指数影象与草地产量级之间的关系；研究不同“面”内的不同景观组分对植被指数的贡献，回归出统一的产草量预报模式；进行牧草产量和季节牧场载畜量的动态监测，形成了一套完整有序的监测方法和步骤。可在大范围的草地上使用ＮＯＡＡ／ＡＶＨＲＲ资料，进行草地的分级、制图和估产，并准确地标识出它们的位置和分布规律，进行季节牧场载畜量的平衡分析，为季节畜牧业的实行提供依据。

with the application of NOA A/AVHRR data,the monitoring method of grassland biomass vield andcarrying capacity was described in the study,According to the characteristics of NOAA/AVHHR data andgrassland utiliZation in our country,the meanvegetation index image was set up to eliminate all errors of thevegetation index data and other newly rectified vegetation index equation was hereby constructed.Makinguse of the concept of correlation between small areas of grassland ground level and their images,the relation-ship between mean vegetation index and the biomass yield grade of grassland was figured out;The contribu-tion to vegetation index of each grassland type in one specific area was also studied to set up a certain regres-sion model for the be nefit of grassland biom ass yield prediction, thus liable to accomplish the methodologyand procedure for the dynamic monitoring of forage production and carrying capacity on seasonal grasSland.By using NOAA/AVHRR data,it provides lots of facilities to grassland gradation study,map-making andbiomass yield prediction on a large scale and meantimely supplies basic informations for marking out preci-sion adjustment in the distribution of forage plants resources as well as in designin g appropriateness to es-timate carrying capacity in seasonal rangeland,therefore finally fulfilling the modeling of seasonal animalraising industrial production.