硝酸钾不同追施时期对烤烟生长的影响
xiandai nongcun keji(2011)
Abstract
<正>烤烟在平邑县种植历史悠久,常年种植面积在3万亩左右,是增加农民收入的重要产业。但由于多年连作再加上施肥不当,造成产量下降,农民收入减少。笔者根据当地实际情况,通过多年调查与试验发现,在种植模式相同的情况下,硝酸钾的追
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