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作物常以行结构方式播种，行结构能引起作物垄间光照土壤和垄内阴影土壤间较大的温度差异，且在方位角上可导致明显的正像元组分构成差异，这些差异使行播作物在方位角和天顶角上同时存在热辐射方向性变化．将作物行结构方式当作随机播种方式来处理，显然会使热辐射方向性产生较大的误差．为消除误差，有必要研究行播作物的热辐射方向性规律．用 Ｍｏｎｔｅ Ｃａｒｌｏ方法模拟行播结构参数对作物热辐射方向性的影响，模拟结果表明：垄宽、垄高、垄间距和叶面积指数等参数对热辐射方向性的影响都比较明显，但影响最大的因素是观测方位角．
Crops are often sown in a row structure and the row structure can cause large temperature differences between the crop litter and shadow soil in the ridge and can cause significant positive pixel component differences in azimuth, Propagation of crops in the azimuth and zenith angles exist at the same time the direction of thermal radiation changes. The crop row structure as a random sowing approach to deal with, it will obviously make the thermal radiation directivity greater error. In order to eliminate the error, it is necessary to study the directivity rule of heat radiation of line sowing crops. Monte Carlo method was used to simulate the effects of row structure parameters on the radiative directivity of crops. The simulation results show that the effects of ridge width, ridge height, ridge spacing and leaf area index on thermal radiation direction are obvious, The factor is the azimuth of observation.