冬小麦产量构成分析与遥感估产

THE STRUCTURE ANALYSIS OF WINTER WHEAT YIELD AND THE PIRNCIPAL OF REMOTE SENSING ESTIMATION OF WINTER WHEAT YIELD

本文叙述了作者在可控样地条件下所做的冬小麦遥感估产试验的结果及其分析。 所谓可控样地,就是冬小麦种在几个封底的长3.25m、宽2.37m、深2.00m的水泥池中,用控制冬小麦的施肥量与灌水量的方法,人为地拉开各块样地的单产值。在整个冬小麦生长期内测定必要的农学参数,如叶面积系数、穗数、平均粒数、千粒重等;同时测定各个生长期冬小麦的光谱值。在找到不同生长阶段的光谱参数与冬小麦3个产量构成因素之间的相关关系的基础上,确立了冬小麦遥感估产的整体地面模型公式,并对冬小麦遥感估产的原理进行了分析与讨论。

This paper tells some experimental results of remote sensing estimation of winter wheat yield under the condition of controlable sample fields. The controlable sample field means that winter wheat was grown on a cement pool with 3.25 meters long, 2.37 meters wide and 2.00 meters in depth to enlarge the span of yield by controling fertilizer and watering. During the growing season necessary agronomic parameters, such as LAI, the ear number, average grain number and the grain weight, etc., were measured, at the same time we measured spectral parameters. Based on finding the relationship between spectral parameters of different stages and three basic factors which form winter wheat yield an integral formular for remote sensing winter wheat yield estimation was found. An analysis and discusion was made for the principal of remote sensing estimation of winter wheat yield.