| Tianda-2116"is a plant growth regulator that main component is chitosan, which is made in Tianda biotechnology limited company in Shandong. Plant characteristic, physiological traits, yield and quality of winter wheat Xinong 383 are mainly studied with randomized blocks arrangement and eight treatments, so it can supply a theoretical basis for wheat production. The main results are as follows:1. "Tianda-2116"can retarded seedling height which is decrementaller than control by 1.5 percent, increase root cap specific value , which is larger than control by 10.7 percent, increase tiller quality, lower plant height which is less than control by 1.3 centimeters and the treatments C, D and G get significant, The first and second stems in culm base are lower for 0.17 centimeter and 0.34 centimeter, so the resistance to lodging becomes stronger. Besides those, "Tianda-2116" has wheat louses repelling effect, the numbers of louses become less than control by 15.6 percent, and the effect of treatment D is the best.2. "Tianda-2116" have a regulating effect on flag leaf physiological traits. It can decrease water loss of flag leaf, increase water-holding capacity which becomes higher than control by 13.2 percent, and the effect of treatment D is the best; It can increase the maximum chlorophyll content increased by 4.6 percent, and retard the starting time of chlorophyll rapid stage of submergence, so it has better effect on leaf functional stage. Flag leaf slow stage of submergence of photosynthesis becomes longer than that of control by 2.6 days, so leaf functional stage delays; After "Tianda-2116" treatment MDA content that is the main product of membrane lipid peroxide increases slowly, which shows that senescent of flag leaf becomes longer.3. "Tianda-2116" can raise the accumulative amount of dry matter and increase transportpercentage from matter before flower to grain which is larger than control by 1.2 percent; the treatments D and G are better, so the potential source of wheat grain-filling matter increases too. Besides those, after the "Tianda-2116" treatment the time of the maximum grain-filling rate delays for about five days. After that, the grain-filling rate becomes higher than control.4. Through the "Tianda-2116" treatment, wheat ear characteristic can improve. Its ear length becomes longer than control by 7.8 percent, the sterile spikelets become less than control by 20.2 percent, the non-sterile spikelets is higher than control by 10.7 percent, the grains per ear become larger than control by 2.1 grains, the full grain index increases, the treatment D gets very significant, it becomes higher than control by 2.8 percent, weight of 1000 grains is higher than control by 6.8 percent.5. "Tianda-2116" has an effect on the yield. Its yield increases from 0.75 percent to 13.33 percent, among which the treatment D increases most, which is 13.33 percent. In addition, grain quality has a certain improvement after the treatments of "Tianda-2116".In sum, different treatment has different regulating effect on the growth and development of winter wheat. And the treatment that seed dressing combined with foliage spray is the best. The effect of foliage spray has a better effect at flowering stage than that at jointing stage. But the treatment of only seed dressing is the less. |
