定位施肥对甘蔗产量及土壤肥力的影响

根据1998～2003年连续6年在福建省仙游县大济镇坑北村进行甘蔗连年保持不变的定位施肥研究,结果表明:有机无机肥结合使用和化肥合理配施与当地群众习惯施肥比较,其增产增收效果显著。同时,有机无机肥结合使用具有增强土壤自身能力,是培肥地力的一条有效途径;化肥合理配施对培肥土壤也有一定的促进作用,在农业生产上,是不可忽视的一项先进施肥技术措施。试验结果还表明:长期不施肥会造成土壤衰竭,地力贡献率急剧下降,必须合理补充肥料以归还作物所带走的养分,尤其要投入足量的有机肥料,使其土壤有机质维持在一定水平上,以保持土壤养分平衡。

Effect of Location Fertilization on Sugarcane Production and Soil Fertility

The experiment of sugarcane location fertilization was conducted in Xianyou of Fujian province from 1998 to 2003. The results showed that cane yield and planter's incomes under the both combination application of organic with inorganic and chemical fertilizers were increased significantly in comparison with conventional fertilization. The combination application of organic with inorganic fertilizers increased soil fertility,and the chemical fertilizers played a certain role in the soil fertility. The experimental results further indicated that the soil fertility would be faint/exhaustion and sharply decline in fertility rate for long-term non-fertilization. Complementary organic fertilizer must be reasonable.