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产量是种植适宜程度的重要表征。从较大的范围看,形成产量的基本环境条件是气候条件,同时也不能忽视品种、土壤、地形、耕作制度、栽培技术以至历史习惯的影响。前面已经指出,我省大小麦的平均产量与全生育期的平均日照条件关系十分密切,与降水量也有较好关系。因此对大小麦的农业气候区划以上述考虑为基本依据。取全生育期的日照时数为一级农业气候指标;全生育期降水量、抽穗成熟期降水量分别为二级农业气候指标1和2,作为大小麦区划农业气候指标。划区时,以一级指标划分麦区,二级指标划分亚麦区,适当参考地形地貌和行政区域等情况。
Yield is an important indicator of the suitability of planting. From a larger perspective, the basic environmental conditions for yield formation are climatic conditions, and the effects of species, soil, topography, cropping system, cultivation techniques and even historical practices can not be ignored. As we have already pointed out, the average yield of wheat in large and small areas in our province is closely related to the average sunshine conditions during the whole growth period, and has a good relationship with the precipitation. Therefore, the above-mentioned considerations on the agricultural climate division of big and small wheat are the basic basis. Take the sunshine hours throughout the growth period as an agricultural climate indicators; precipitation during the whole growth period, the precipitation at maturity are secondary agricultural climatic indicators 1 and 2, respectively, as the agricultural wheat climatic index. When plotting area, the wheat area will be divided by first grade index, the second grade index will be divided into sub-area, with appropriate reference to topography and administrative area and so on.