农业机械学报2017，Vol.48Issue(3)：270-278,9.DOI:10.6041/j.issn.1000-1298.2017.03.034
水肥供应对榆林沙土马铃薯生长和水肥利用效率的影响
Effects of Water and Fertilizer Supply on Growth, Water and Nutrient Use Efficiencies of Potato in Sandy Soil of Yulin Area
摘要
Abstract
Considering the low water and fertilizer use efficiencies with flood irrigation in sandy soil of Yulin,Northern Shaanxi,the effects of different water and fertilizer supplies on potato growth,yield and water and fertilizer use efficiencies were investigated through the field drip fertigation experiments.There were three water levels:W1 (60％ ETc),W2 (80％ ETc) and W3 (100％ ETc),and three fertilizer levels:F1(1OO-40-150kg/hm2),F2(175-60-225 kg/hm2) and F3(250-80-300 kg/hm2),resulting in a total of nine treatments.Based on those,key indicators (e.g.,growth and yield) of potato in response to different irrigation water and N,P and K amounts were further analyzed.Results showed that different water and fertilizer amounts significantly influenced the plant height,leaf area index,dry weight,yield,water use efficiency (WUE),partial factor productivity of fertilizer (PFP),different tuber quality,yield related relations and economic benefits.The growth,yield and PFP were increased with the increase of irrigation amount,and W3 was more beneficial to growth of potato.However,the water use efficiency of W3 was significantly lower than those of W1 and W2.The average water use efficiency of W1 was 5.83％ and 13.05％ higher than those of W2 and W3.The impact of fertilizer on growth and yield showed an increasing and then decreasing trend,and yield reached the maximum of 59394.98 kg/hm2 at W3F2 level.The water use efficiency of F2 was significantly greater than those of F1 and F3.Linear fitting revealed a positive relationship between plant height,leaf area index,dry weight and yield of potato within a certain range.Comprehensive analysis indicated that the appropriate irrigation and N,P and K amounts can not only maintain the good growth of potato,but also can obtain great yield and economic benefits.From the point of view of obtaining high yield and saving water and fertilizer,W3F2 (100％ ETc,175-60-225 kg/hm2) can be used as an appropriate combination under the present experimental conditions.关键词
马铃薯/滴灌施肥/生长/产量/水分利用效率/肥料偏生产率Key words
potato/drip fertigation/growth/yield/water use efficiency/partial factor productivity of fertilizer分类
农业科技引用本文复制引用
张富仓,高月,焦婉如,胡文慧..水肥供应对榆林沙土马铃薯生长和水肥利用效率的影响[J].农业机械学报,2017,48(3):270-278,9.基金项目
国家自然科学基金项目(51579211)和陕西省农业领域重点产业创新链项目(2016KTZDNY-01-02) （51579211）
