一、穗表面积的估测目前估测麦穗(不连芒)表面积方法中,一是公式(穗长×穗宽×3.8),二是 C.S.Saha 等的公式〔(穗基部第2结实小穗的长×宽)×2(小穗总量)〕。采用方格座标纸折算法测定麦穗的表面积,即分别在座标纸上逐一测定整穗全部小穗(包括退化小穗)的表面积,最后累计成整穗表面积。座标纸折算法虽费时,但较准确。以宁麦三号品种为材料,随机选取20穗(单穗具19～22个小穗,包括1～3个退化小穗)比较了座标纸折算法与上述两公式的估测值(表1)。结果表明,如以座标纸折 I. Estimation of Spike Surface Area Currently, in the method of estimating the surface area of ​​spikelets (spikelets), one is the formula (spike length × spike width × 3.8), and the second is the formula of CSSaha [(2nd spikelet base Length × width) × 2 (total spikelets)〕. The surface area of ​​wheat ears was determined by the method of box paper conversion. That is, the surface area of ​​whole spikelets (including degenerative spikelets) of the whole ears was measured one by one on the coordinate paper, and the total surface area of ​​whole ears was accumulated. Coordinate paper translation method is time-consuming, but more accurate. Taking Ningmai 3 as material, we randomly selected 20 spikes (19-22 spikelets per spike, including 1 ~ 3 degenerated spikelets). The comparison between the coordinate paper method and the above two formulas 1). The results show that, as in the coordinate paper folding