试验结果表明，双价转基因抗虫棉新品种中棉所45，在豫东周口市麦棉套作区种植，适宜施N水平为112.5~187.5kg/hm2，皮棉产量可达1259.45kg/hm2以上，产量构成因素协调，经济效益好，元氮肥纯增值4元，病虫害发生较轻，增值大。在较低施氮水平，能获得较高皮棉产量，高产低成本，是中棉所45在当地表现突出的优良特性。

Results of this experiment showed, for CCRI 45 growing in cultivated region in Zhoukou in eastern Henan Province the most suitable application N levels were 112.5~187.5kg/hm2, highest fiber cotton yields could reach 1259.45kg/hm2, production structure factors were reasonable, economic benefit is very good, net income increased 4 yuan compared with no N, the insect and pest occurred lightly. Output Value increased greatly. High fiber cotton yields were received at lower N levels, it’s outstanding advantage for CCRI 45 to turn low cost to high yield.