Abstract:
【Objective】 To provide a theoretical basis for wheat planting in northern Xinjiang.
【Methods】 Five factors (soil texture, irrigation mode, irrigation quota, irrigation frequency and soil mulch film residue) were selected, and four levels were set for each factor, and the difference of spring wheat plant height, chlorophyll value, effective ear number, ear grain number, yield, water use efficiency and soil moisture content under different experimental factors were explored. Meanwhile, the apriori algorithm was used to explore the association rules between physiological indicators.
【Results】 The change trend of wheat plant height under different treatments during the whole growth period was basically the same, and the factor that had a greater influence on wheat plant height was the irrigation system. The chlorophyll value of wheat showed a unimodal trend during the whole growth period, and appropriate improvement of soil fertility could increase yield. There was a significant correlation between soil moisture content and soil texture and irrigation volume. Moderately increasing irrigation during the filling period could increase the photosynthetic rate of wheat leaves and achieve the effect of increasing yield. The frequency of irrigation and the irrigation method had a significant impact on the yield and yield composition factors of wheat, and the yield increase effect of infiltration irrigation was outstanding. The highest water consumption, maximum number of ear grains, maximum effective ear number and maximum plant height were strongly correlated. The highest water consumption was strongly correlated with the lowest dry matter weight and the lowest
SPAD value. The highest plant height was strongly correlated with the lowest
SPAD value.
【Conclusion】 The soil texture is clay loam, the irrigation method is seepage irrigation with 700 kg/hm
2, and the highest yield of spring wheat is achieved when the residual amount of mulch is 0, which is able to reach 71.56 g/pot. The irrigation quota of 700 kg/hm
2 is strongly correlated with the highest water consumption, maximum plant height, minimum
SPAD value, maximum effective panicle number, maximum ear grain number. Excessive irrigation and consumption will lead to high plant height, and low
SPAD value.