一、甘蓝的需肥特性甘蓝有较发达的根系,根群主要分布在30厘米的根层内,是喜肥和耐肥蔬菜。甘蓝定植后约35天植株对氮、磷、钙等营养元素的吸收量达到高峰,而对钾的吸收量则在50天时达到高峰。在达到高峰值之前,植株的吸肥量随生育期进程基本呈直线上升趋势。不同的生育期甘蓝对养分吸收有不同的要求。以 First, the characteristics of the needs of cabbage Cabbage has a more developed root system, the root mass is mainly distributed in the root layer of 30 cm, is hi and fat-resistant vegetables. About 35 days after planting cabbage nitrogen, phosphorus, calcium and other nutrients reached the peak absorption, while the absorption of potassium reached its peak in 50 days. Before reaching the peak value, the plant uptake of fertilizer with the growth process basically straight upward trend. Different growth stages of cabbage have different requirements for nutrient absorption. To