氮磷钾用量对宣薯2号产量及结薯特性的影响  

Influence of Different NPK Fertilizer Amount on Yield,Tuber Characters of Middle-late Potato Variety Xuanshu No.2

作　　者：周应友 付梅 

机构地区：[1]遵义县农牧局农技站,贵州遵义563100 [2]贵州省农作物技术推广总站,贵州贵阳550001

出　　处：《耕作与栽培》2016年第6期42-44,共3页Tillage and Cultivation

摘　　要：在马铃薯与玉米套种模式下开展了氮磷钾不同用量对中晚熟马铃薯品种宣薯2号产量的影响试验,旨在为遵义县提出高效益的施肥方案。结果表明,不同氮磷钾用量对中晚熟马铃薯宣薯2号产量及结薯特性均产生较大的影响,但对生育期影响不大。在一定范围内,单株结薯数和单株薯重与氮磷钾用量成正比,单株结薯数与单薯重成反比关系;但施肥过量产量不再提高反而降低。N、P_2O_5、K_2O纯养分施用配方为8.75kg/667m^2、4.83kg/667m^2、17.5kg/667m^2,产量高达1893.4 kg/667m^2,套种的经济效益明显。The purpose was to screen reasonable fertilizing scheme for potato cultivation in zunyi county, a NPK fertilizer amount test was conducted under the potato and maize intercropping mode, middle - late variety Xuanshu No. 2 was the test material. The results indicated that the different NPK fertilizer amount have great influence on the yield and tuber characters of Xuanshu No. 2, but have less impact on the growth period. Within a certain range of NPK fertilizer amount, the number of potato tubers and the weight of signal plant is increase with the increasing of NPK fertilizer, however , the number of potato tubers is inverse relation to its weight, the yield could decrease when the NPK fertilizer was overused. The treatment of N, P2 O5, K2O was 8.75 kg/667m2, 4.83 kg/667m2, 17.5 kg/667 m2, respectively, the yield reached 1893.4 kg/667m2 and the intercropping economic effect was higher.

关 键 词：马铃薯 宣薯2号 氮磷钾肥 产量 结薯特性 

分 类 号：S513.01[农业科学—作物学]