Relationship Between Ecological Factors And Quality Of Wheat

Six wheat cultivars (PH85-16, yannong 15, PH82-2-2, Jinan 17, yanfu188, yanyou361) are used to study the expression of quality characters of wheat in different locations and to find the relationship between quality of wheat and ecological factors. Then the relationship between quality and quantity of wheat under nitrogen fertilization is discussed in this topic. The results are as follows:1. The quality properties of the wheat assortment of Shandong province are greatly different. The coefficient rate of stability time of dough was variant greatly in the characteristics tested in quality, so did the development time. But the coefficients of protein and wet gluten were variant little. Therefore the dough development time and stability time in high quality wheat have greater improvement and choice.2. The quality properties of the variety of wheat are apt to be affected by environmental condition such as climate , soil , culture measure ,etc. This result of study indicates, the quality properties of the wheat are remarkable in the difference among different ecological areas. Protein , wet gluten content, the ratio of water absorb, dough stability time and development time all reach remarkable competence extremely by variance analysis. Even plant in the same area, the quality properties have obvious differences. Whether dough development time and stability time, total trend make a variation heavy. Then protein content and absorption appeared variant very little.3. Through quality properties and climate regression, the climate factor (temperature , precipitation and sunshine ) has important influence on quality properties of the wheat. Protein content , wet gluten content , absorb water rate heavily affected by sunshine time, secondly the precipitation, affected by temperature on average and changed minimum. The 10 ecological factors are negative accumulate temperature in winter, average temperature of 15days before mature, highest temperature of 15days before mature, lowest temperature of 15days before mature, temperature range of a year, rainfall during bearing period etc. Among these ecological factors, temperature range of a year and rainfall of May have the most important relationship with quality of wheat. Temperature range of a year has positive influence on protein content, gluten content, water absorption, kernel hardness, dough development time and stability time. Rainfall of May has negative influence on kernel hardness, protein content, water absorption, dough development time and stability time, but has positive influence on sedimentation value.Through carrying on multiple linearity regress between the ecological factors and wheat quality characteristics, the regress equations was as follows: Y=-0.0060X1-0.0006X4+0.1037X8-0.0309X10(R=0.7425)Y:proteinX1: negative accumulate temperature in winterX4: accumulate temperature during the bearing periodX8:temperature range of a yearX10: rainfall of MayY=-0.0845X3+0.0343X4-0.0880X6+0.0633X7-0.0005X10(R=0.8095)Y:kernel hardnessX3:accumulate temperature before winterX4:accumulate temperature during the bearing periodX6:average temperature of 15 day before matureX7:temperature range of a yearX10:rainfall of MayY1=0.0101X4+10.4561X5+105621X7-0.02145X10+5.9560(R=0.89763)Y2=0.0015X4+2.5489X5+0.2587X7-0.0035X10+8.9973(R=0.8562) Y1: moisture gluten contentY2: dry gluten contentX4: accumulate temperature during the bearing periodX5: accumulate temperature from filling to matureX7:temperature range of a yearX10:rainfall of May4. A quality of wheat seed and soil factor have certain dependence. Water absorption has negative relationship with soil type and soil organic content; protein content , wet gluten content ,dough development time and stability time have positive correlation with soil type and soil organic content , but these correlations are not significant. Protein content, wet gluten content and dough development time have negative correlation with quick-acting content of phosphorus of soil. The ne...