Multiple location experiment of technique system for direct rational application of vinasse from cane mill in sugarcane fields.

For purposes of eliminating environmental pollution and transferring the waste into valuable fertilizer through rationally applying it in sugarcane fields directly,a technique system for direct rational application of vinasse from cane mill in sugarcane fields was established,and different rates of fresh vinasse were experimented in 6 sides of different regions representing different ecological conditions in Guangxi,China in 2005.Based on the performance of both the plant and ratoon crops,the average cane tonnages were 92.3,102.5 and 93.7 t/hm2 for the treatments with 45,75 and 105 t/hm2 vinasse,respectively,which were 13.24 %,17.55 % and 14.92 % higher than that of non-fertilizing control(CK1),and 7.66 %,11.75 % and 9.25 % higher than that of the conventional fertilization control(CK2),respectively.The sucrose % cane was 14.66 %,14.85 % and 14.83 %,for the treatments with 45,75 and 105 t/hm2 vinasse,respectively,which was 0.06 %,0.25 % and 0.23 % higher than that of CK1,and 0.11 %,0.30 % and 0.28 % higher than that of CK2,respectively.The above experimental results showed that the vinasse from sugarcane mill should be a very good complete organic fertilizer for sugarcane,and the fresh vinasse could be rationally applied in the fields without any dilution or pretreatment,which would produce significant increases in cane tonnage and sucrose % cane and reducing the chemical fertilizer application and production cost so resulting in more profit for sugarcane and sugar production while avoiding environmental pollution,and especially,the treatment with 75 vinasse showed the best economic benefit.The direct rational application of fresh vinasse in sugarcane fields is practically possible through a set of technical measures.