Studies On The Wheat Kernel Quality And Its Spatial Vairability In District Level

Wheat kernel quality from different areas was different as it was significantly influenced by qualityof wheat varieties, environmental conditions and cultivated measures, which formed the basis of highquality wheat production regionalization. The environmental conditions were closely associated withwheat kernel quality, which formed the natural basis of high quality wheat production regionalization.The environmental conditions that affect the growth of crops such as topography, climate, and soilparent materials exhibit spatial variability. The choice of wheat kernel quality parameters for wheatproduction regionalization was different in different studies and lacked the theoretical basis and analysisvalidation. However, the theoretical basis of selection of wheat kernel quality parameters for highquality wheat production ragionalization is selected wheat kernel quality parameters have significantgeological characteristics.A total of1227wheat samples were collected from farmlands in the north of Henan Province,Guanzhong Area of Shaanxi Province, and the central of Hebei Province from2008to2012. The varietycomposition, wheat grain quality and quality types of three regions, wheat grain quality of mainproducing cultivars were analyzed. Spatial variability characteristics of wheat grain quality traits innorth of Henan Province and Guanzhong Area of Shaanxi Province were analyzed using geostatistictechnology of Geographic Information System. Wheat grain quality parameters which have significantgeological characteristics were selected by analyzing spatial correlation and spatial distribution maps ofwheat kernel traits in two regions, which provided the theoretical basis and methods for high qualitywheat production regionalization. The main conclusions drawn from this research were listed asfollows:(1) For the three main wheat production regions, the number of wheat varieties in each area waslarge, and grain quality of different varieties was quite different, and the planting proportion ofmiddle-gluten wheat varieties was higher than weak and strong gluten wheat varieties.(2) Strong gluten wheat samples were mainly distributed in north of Henan Province, and theplanting proportion of medium-strong and medium wheat in the central of Hebei Province is larger, andthe wheat gluten strength in Guanzhong Area of Shaanxi Province was medium-weak level. However,the wheat protein quality parameters such as kernel protein content, wet gluten content, andsedimentation value in Guanzhong Area of Shaanxi Province was superior to that of in north of HennaProvince and in the central of Hebei Province.(3) In a certain area, the spatial distribution of wheat dough stability time was similar tosedimentation value, and the similarity of spatial distribution characteristics of the dough stability timeand sedimentation value won’t not be changed with regions variation as well as the variation ofpopulations such as single wheat cultivar or random cultivars.(4) In a certain area, wheat dough stability and sedimentation value exhibited strong and moderatespatial correlation, and this spatial correlation remained stable with the change of years, study areas as well as populations. The spatial correlation of kernel protein content, wet gluten content,1000-kernelweight and test weight won’t change greatly with the interannual variation, study regions variation andpopulations.(5) Wheat dough stability and sedimentation value could be regarded as key reference indicatorsfor high quality wheat regionalization.