我县甘薯(红芋)栽插面积占全县耕地面积的四分之一,红芋产量占粮食总产量的三分之一以上。由于春红芋生长时间较长,绝大部分都是一年一季,年年冬闲,来年春栽时又与其它作物争肥,致使春红芋地施肥较少,有的甚至“白田”栽植,影响红芋产量增长。为 My county sweet potato (red taro) planted area accounted for a quarter of the county arable land, red taro production accounted for more than one-third of the total grain output. As spring red taro grow longer, most of them are year after year, year after year winter leisure, the spring of next year and other crops for fertilizer, resulting in spring red taro less fertilizer, and some even “white field” planting, Affect the growth of red taro yield. for