Effects of Reduced Chemical Fertilizer Combined with Organic Fertilizer on Growth,Yield,and Soil Bulk Density of Potato
In order to explore the effects of reduced chemical fertilizer combined with organic fertilizer on growth,quality traits,economic benefits,and soil bulk density of potato in the southern mountainous area of Ningxia,a field plot experiment was conducted using conventional fertilization(CK)as a baseline.On the basis of a 15%reduction in conventional fertilization,the effects of applying 2 000 kg/667 m2,4000 kg/667 m2,6 000 kg/667 m2,and 8 000 kg/667 m2 of farm manure on potato plant height,number of branches,stem-leaf natural weight per plant,number of tubers per plant,weight of tubers per plant,yield,economic benefit,and soil bulk density were studied.The results showed that compared with conventional fertilization,with the increase of organic fertilizer dosage within a certain range,the plant height,number of branches,stem-leaf natural weight per plant,number of tubers per plant,weight of tubers per plant,yield,and economic benefit of potato all showed a trend of first increasing and then decreasing.Overall,the best performances were 15%reduction in conventional fertilization plus 6 000 kg/667 m2 of organic fertilizer and 15%reduction in conventional fertilization plus 4 000 kg/667 m2 of organic fertilizer.On the basis of a 15%reduction in conventional fertilization,in order to achieve the yield level of conventional fertilization,the maximum application amount of farm manure on potato was 11 145.61 kg/667 m2.Adding a certain amount of organic fertilizer can significantly reduce soil bulk density.On the basis of a 15%reduction in conventional fertilization for potatoes in southern mountainous area of Ningxia,it is recommended to apply 5 300～5 600 kg/667 m2 of farm manure to achieve the goal of high yield,and to apply 3 000～3 200 kg/667 m2 of farm manure to achieve the goal of high efficiency.
potatoorganic fertilizerreduced chemical fertilizergrowthyieldquality traitseconomic benefitssoil bulk density
万方数据
维普
