贵州高海拔地区马铃薯平衡施肥效应研究

Effect of Balanced Fertilization on Potato in High Altitude Areas of Guizhou

在贵州高海拔地区织金县采用马铃薯高产栽培技术和平衡施肥技术 ,马铃薯产量为14 .9t/ hm2 ,超过当地平均产量 1.5倍 ,钾肥配施可增产马铃薯 1.0～ 2 .5 t/ hm2 ,增幅 8.0 6 %～ 2 0 .6 3% ,施钾产投比可达 2 .0～ 3.5。施钾后马铃薯薯块重量增加 19.2 % ,增产以增加薯块重量为主 ,马铃薯品质有较大改善。试验认为 ,高产高效施肥的 N∶ K2 O为 10 0∶ 95～ 14 0为宜 ,即施氮 (N) 10 5 kg/ hm2 ,施钾 (K2 O) 10 0～15 0 kg/ hm2为宜。

An experiment on balanced fertilization for high yield potato was conducted in Zhijin county at an altitude about 1350m.The potato yield was 1.5 times of the local production level. Applying potash had a positive effect for increasing potato yield from 1.0 t/hm 2 (8.06%) to 2.5t/hm 2 (20.63%). The return was up to 2.0～3.5 times. The average weight of potato tuber was increased by 19.2%. The potato quality was also improved. The best ratio of N∶K was 100∶95～140. The amount of phosphate fertilizer should be based on the soil content of nutrients analysis.