摘要
以15 a生乔砧富士苹果树为试材,采用三因子五水平二次回归正交组合设计,研究了不同氮磷钾配比对苹果产量品质的影响。结果表明,不同肥料对苹果产量影响的顺序为钾>氮>磷,且都是正效应。氮与磷、磷与钾呈正交互作用,氮与钾为负交互作用。以苹果产量4 325.18 kg/667m2为目标,氮、磷、钾肥的最佳施用量分别为27.06 kg/667m21、7.80 kg/667m2、2.06 kg/667m2。高氮对增加果品重量有效果,却对改善果形无益,且不利于果实内含物的积累。适当增施磷、钾肥有利于改善果实的着色;氮素过高或过低都不利于提高果实硬度;氮和钾对促进苹果糖分的积累更为显著。减少磷、氮素供应可在一定程度上降低果实酸度。高钾处理比中、低钾处理的Vc含量更高。
Three-factor five-level quadratic regression was used to study the effects of different ratios of N, P and K fertilizers on the yield and quality of fifteen-year old Fuji apple trees in south Xinjiang. The results showed that the order of effects on yield were potassium 〉 nitrogen 〉 phosphorus and they were all positive. N and P, P and K were positively interacted, while N and K were negatively interacted. With apple production 4 325.18 kg/667m2 as the goal, the optimal combination of N, P and K were respectively 27.06 kg/667m2, 17.80 kg/667m2 and 2.06 kg/667m2. The influence on quality showed that high N can increase fruit weight but can not either improve its shape or enhance the accumulation of content in fruit. Appropriate P and K can improve fruit color, while too high or too low N can not improve fruit hardness. N and K can promote significantly sugar accumulation in fruit. Controlling P and N supplying can reduce the fruit acidity to some extent. High K treatment produce high Vc content.
出处
《干旱地区农业研究》
CSCD
北大核心
2011年第6期130-134,共5页
Agricultural Research in the Arid Areas
基金
新疆自治区重大专项"果树营养特性与水肥耦合技术研究"(200731136-5)
新疆自治区土壤学重点学科建设项目
关键词
苹果
产量
氮磷钾配比
品质
apple
yield
ratio of nutrients
quality
