Sunflower Faceplate Irrigation And Fertilization Time Course Of The Study

Disk differentiation during a critical period affecting sunflower production. Disk internal differentiation process research and development relationship with the morphological characteristics of plants, plant morphological indicators to identify internal disk discriminating differentiation and development period, the development of rational management measures to promote the cultivation of plants faceplate increased in the number of grain to obtain high yield, with significant meaning. While understanding sunflower faceplate internal development and external shape corresponding to the relationship, but also through different fertilizer and water management field period. Sunflower field to determine the best fertilizer management period. The results are as follows:(1) Sunflower Disk differentiation and development is divided into six periods: Early differentiation faceplate →Disk differentiation →Floret of →Pistil differentiation stage →Ovary ovule differentiation form of →Differentiation pollen formation stage. Disk early leaf differentiation index of 24% or less, disk differentiation stage at the beginning of leaf index was 24%, when the flowers began to leaf differentiation index was 45 percent, when the pistil differentiation begin leaf index was 48%, ovary ovule differentiation starting formation of leaf index of 69% of start-leaf form pollen differentiation index 86%.(2) Irrigation in sunflower floret of fertilization can effectively promote the faceplate differentiation and development process, floret height of fertilization and irrigation, faceplate diameter, single-disc grains, grain weight single disc, the greatest impact on grain yield increase, floret late, pistil differentiation of pre-fertilization and irrigation treatments on chlorophyll content, the rate of increase in shell greatest impact, pistil differentiation of fertilization and irrigation effect on plant leaf area, photosynthetic capacity of the most significant late pistil differentiation, differentiation of the early pollen fertilization and irrigation on grain filling effect rate, the maximum grain weight.