ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

The deficiencies of essential macronutrients of nitrogen (N) and potassium (K) usually affect the production of chlorophyll, cause imbalances in plant growth and drastically most importantly affect the quality and yield of agricultural products. A new N/K deficiency diagnostics method was proposed based on chlorophyll distribution features of the whole cucumber leaf. N/K deficient cucumber plants and control plants were grown under nonsoil conditions with special nutrient supply. Chlorophyll distribution maps of N deficient leaves, K deficient leaves and control leaves were determined by using hyperspectral imaging technology and genetic algorithm, and distribution features extracted from the chlorophyll distribution maps were employed to diagnose N/K deficiencies. Chlorophyll distribution features (the mean value of all pixels in leaf center region and the number of pixels with low chlorophyll content in the leaf edge region) were extracted. A diagnostic method based on these features were obtained with total diagnostics rates of 95% for N/K deficiencies. The result indicated that the extracted chlorophyll distribution features could be employed to diagnose N and K deficiencies in cucumber plants.