【摘要】 在甘肃高海拔干旱区采用马铃薯高产栽培技术和平衡施肥技术,马铃薯产量为35 350 kg.hm-2,超过当地平均产量1.2倍,配施钾肥马铃薯可增产16.7～2 916.7 kg.hm-2,增幅0.1%～9.0%,每千克K2O可增收马铃薯0.2～19.4 kg,增产增收效益好。施钾后马铃薯薯块数增加29.3%,薯块重增加7.7%,增产以增加穴薯为主,其次是增加薯块重,同时马铃薯品质也有较大改善。试验表明,在施入适量有机肥和氮磷基础上,高产高效的K2O用量为150 kg.hm-2。更多还原

【Abstract】 By using potato high yield cultivation and balanced fertilization techniques in the arid region of high altitude in Gansu,potato yield could reach up to 35 350.0 kg·hm-2,1.2 times more than that of local average.With addition of K fertilizer,the potato yield increased by 16.7～2 916.7 kg·hm-2,increasing by 0.1%～9.0%.One likogram K2O could increase the potato yield by 0.2~19.4 kg.With application of K fertilizer,the number of potato tuber per hill increased by 29.3%,and tuber weight by 7.7%.The increased yield was due to increase in the number of potato tuber per hill,and then to increase in tuber weight.The potato quality,starch and vitamin C,was also improved.The experiment suggested that when manure N and P fertilizers were appropriate,the optimum rate of K2O was 150 kg·hm-2.更多还原