Investigation study on Fertilization status of Grape in Wafangdian City
In order to understand the fertilization status of grapes in Wafangdian City and better guide farmers to apply fertilizers reasonably,the author conducted a survey on the fertilization status of 91 vineyards in Liguan and Xutun towns of Wafangdian City.The results indicated that there were two main types of fertilizers used in vineyards:organic fertilizers and chemical fertilizers.The base fertilizer was mainly organic fertilizer(accounting for 88.0%of the surveyed vineyards),while the topdressing was mainly nitrogen phosphorus potassium ternary compound fertilizer(accounting for 98.9%of the surveyed vineyards).69.2%of the surveyed vineyards applied basal fertilizer once,15.4%applied base fertilizer twice,while 15.4%of the vineyards did not apply basal fertilizer.Topdressing is mostly done three or four times,accounting for 71.5%of the surveyed vineyards.The average application rates of N,P2O5,and K2O nutrients in the vineyard were 43.97,28.34,and 47.77 kg/666.7 m2,respectively.Among them,the N,P2O5,and K2O provided by chemical fertilizers accounted for 64.4%,60.2%,and 73.9%of the total input,respectively.The fertilizer usage in Liguan Town's vineyard was significantly higher than that in Xutun Town.The amount of fertilizer applied increases with tree age and yield,with a ratio of 1∶0.64∶1.09 for N,P2O5,and K2O.The proportion of phosphorus fertilizer in low yield vineyards was relatively high.There were problems with excessive use of chemical fertilizers,low use of organic fertilizers,and excessive use of phosphorus fertilizers in grape nutrient management.It was recommended to donate organic fertilizers and reduce the application of phosphorus fertilizers.
万方数据
维普
