Research On Some Ecological And Physiological Characteristics Of Different Row Space And Seeding Quantity Of Heavy Panicle Type High Yield Winter Wheat

In a certain range, with the increase of sowing quantity, the wheat yield is also withincreasing, but out of this range if continuing to increase the sowing quantity, the productiondeclines instead, however, the row spacing shows the opposite. This research uses the newcultivated wheat strain of522-041,527-171, designing different sowing quantity, row spacingto study the influence of different sowing quantity and row spacing combination to the wheatyield, the group canopy temperature, the ground temperature, the absorption of light quantumin different canopy layers, the leaf chlorophyll contents, the leaf catalase contents, thephotosynthesis of physiological characters and the number per unit area, the grain size, thesingle grain numbers per spike biological effects, in order to find the best combination ofsowing quantity and row spacing. The results are as follows:1. Different treatments on the canopy temperature have significant influence. In the grainfilling stage, the canopy temperature increases at first but declines with the growth periodadvancing. At the corresponding observations, the canopy temperature falls with the increaseof sowing quantity, and the canopy temperature of4.5million seeding quantity per hectare isobservably lower than other quantities, and the dominant factor to the canopy temperature issowing quantity, and the row spacing on the influence of the canopy temperature is notsignificant. Different treatments on the ground temperature are the same as the influence tothe canopy temperature, that is, in the same space and the corresponding observation, in4.5million sowing quantity per hectare, the ground temperature is significantly lower than otherquantities, and the dominant factor of the influence to the surface temperature is sowingquantity. 2. Different treatments to the flag leaf and the penultimate leaf physiologicalcharacteristics have significant influence. In the grain filling stage, the flag leaf and thepenultimate leaf chlorophyll contents decline with the growth period advancing. At the sametime and the same row spacing, in4.5million sowing quantity per hectare, the flag leaf andthe penultimate leaf chlorophyll contents are always higher than other sowing quantities.Different treatments on the catalase contents of the flag leaf and the penultimate leaf show thesame trend as the influence of the leaf chlorophyll contents. That is in the same observationday, the catalase contents of4.5million sowing quantity per hectare are higher than otherquantities.3. Different treatments on the light transmission percentage in different canopy layershave significant influence. During the milk stage and the dough stage, along with the increaseof sowing quantity, the light transmission percentage gradually reduces, and in4.5millionsowing quantity per hectare, the light transmission percentage is significantly lower than otherquantities.4. Different treatments on the wheat have significant effect on the biologicalcharacteristics. In the same row spacing, with the increase of sowing quantity, the number perunit area gradually increases, and in the same sowing quantity, with the decline of rowspacing, the number per unit area gradually decreases. In4.5million sowing quantity perhectare, the number per unit area is significantly higher than others. In the same row spacing,with the increase of sowing quantity, the grain size and the single grain numbers per spikeshow the opposite influence to the number per unit area, that is, the grain size and the singlegrain numbers per spike gradually decrease, and in4.5million sowing quantity per hectare,the grain size and the single grain Numbers per spike are lower than other quantities.5. Different treatments on TKW have significant effect. In the same row spacing, withthe increase of sowing quantity, TKW reduces gradually, and in the same sowing quantity,with the decline of row spacing, TKW increases gradually.6. Different treatments on the wheat yield per acre have significant effect. In the samerow spacing, with the increase of sowing quantity, the wheat yield per acre increases, and withthe decline of row spacing, it declines gradually.Through the data and the theory, we hope the research can provide the theoreticalsignificance to production practices, and can be valuable to the research that the wheat yieldof planting configuration model in different regions.