Effects of Different Cow Dung Composts on Development of Ornamental Sunflower

This thesis mainly studied the effects of cow dung composts as base fertilizers used in ornamental sunflower.According to measuring growth and development indexes of ornamental sunflower,such as plant height,basal stem,leaf area,chlorophyll content,flower stalk,dry weight of inflorescence,shoot and root,fertilizer efficiency of cow dung composting on ornamental sunflower was detected.The results showed:compared with the chemical fertilizer,the fertilizer efficiency of cow dung composting fertilizers was better on ornamental sunflower at the same nutrient content levels;the technology of cow dung composting influenced efficiency of organic fertilizer to play.The optimum conditions of cow dung composting were that straw addition was 7.5%;ventilation time was10 min;water content was 60%;self-prepared microbial agent or straw addition was 5%;ventilation time was 30 min;water content was 50%;self-prepared microbial agent,in which way not only the contaminations of the cow dung composting could be reduced,but also the cow dung composting could be turned to high-quality fertilizers.