Application Of Satellite Remote Sensing In Monitoring Wheat Grain Yield And Quality In Jiangsu

Remote sensing is a newly-developed method to achieve field-crop data non-destructively and rapidly. By the use of remote sensing technology, N application at late growth stage could be suggested accurately, and grain yield and protein content of wheat grains could be forecasted before maturity. Remote monitoring based on nitrogen . The effects of nitrogen on wheat quality and yield have been studied, and the relationship of grain yield and quality with parameters of near-earth spectrum was analyzed in wheat.. Plant morphology and physiological parameters of wheat collected from typical 9 counties in Jiangsu Province were tested in Jiangsu Provincial Key Lab of Crop Genetics and Physiology from 2006 to 2008.The relationship of satellite remote sensing parameters with plant morphological indices and grain yield and quality was analyzed. The main results were as follows:1. Grain yield and quality of wheat sampled from the selected counties were relatively stable among different years from 2006 to 2008 and only a slight fluctuation existed. Wet- gluten content in some samples of weak-gluten wheat was too high, and protein content in some samples of strong-gluten wheat was too low.2. The relationship of remote parameters with physiological traits at anthesis, especially SPAD value, leaf nitrogen accumulation, plant nitrogen accumulation was significant. Remote parameters were significantly correlated with grain yield and quality, and could be used to predict grain yield and quality.3. SPAD value of leaves was significantly correlated with grain protein content .Nitrogen accumulation amount in leaves and plants, dry matter accumulation amount and LAI were significantly related with grain protein accumulation amount in grains, which was slightly affected by soil fertility.4. The correlation coefficient between nitrogen accumulation amount in plants at anthesis with grain protein accumulation amount was greater than that at booting stage. The accumulation amount of N after anthesis was very significantly related with protein content and accumulation amount in grains.5. Band four bands (wavelength range for 0.76-0.90μm), NDVI ,SAVI, OSAVI ,SIPI,NDWI2 ,GNDVI in satellite remote sensing parameters of , had good correlation with grain yield and quality, yield. Principal component analysis showed that OSAVI ,NDVI ,B4, SAVI, SIPI ,NDWI2,GNDVI had greater load in the first PRIN1 factors. OSAVI,NDVI, B4, SAVI, SIPI, NDWI2,GNDVI could be used as characteristic parameters in remote sensing monitoring.