１９９３～１９９４年试验比较了叶面喷施与穴施氮肥的应用效果，并就叶面高浓度喷氮技术进行了探讨。试验证明，以５％～１５％（ｗ／ｗ）的尿素液于８月初至８月底喷施１～３次均可显著地提高棉花的成铃率和铃重，从而提高棉花产量，是补充棉花后期营养的有效途径，试验突破了以往尿素喷施２％的极限浓度，具有安全、高效、节本、增产的显著特点，是比穴施更为优越的一种施肥方法。最佳配比为１１％的浓度于８月５、１５、２５日连喷３次。 The application effects of foliar spray and hole nitrogen fertilizer were compared between 1993 and 1994, and the high concentration nitrogen spray technology was discussed. The test proves that the cotton boll rate and boll weight can be significantly increased by applying the urea solution of 5% -15% (w / w) from the beginning of August to the end of August from 1 August to the end of August, so as to increase the cotton yield. Cotton is an effective way of post-nutrition, the test exceeded the previous limit of 2% of urea spray concentration, with safety, efficiency, cost-saving, significant yield characteristics, is more than the point of application of a fertilization method. The best ratio of 11% of the concentration on August 5, 15, 25 even spray 3 times.