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茶树系采叶作物,对氮素需求十分迫切,氮素肥料曾在茶叶生产中起着重要的作用,因此,现行茶园施肥常常采用以氮为主配施磷、钾肥的方法。但是,由于近年来化肥氮数量不断增加,磷、钾肥供应不足,再加上有机肥肥源欠缺,从而使广大专业户偏施化肥氮的现象日趋严重,这不仅打破了茶园土壤中各种营养元素的平衡关系,同时也导致了茶园基肥与追肥比例失调。据研究,长江中下游广大茶区基肥与追肥的比例(按氮计)以40:60为宜,全年氮、磷、钾比例以2:1:1为宜。但据对低丘红壤地区的调查,无论是基肥与追肥比
Tea tree is a crop, the demand for nitrogen is very urgent, nitrogen fertilizer has played an important role in the production of tea, therefore, the current tea plantation fertilization often use nitrogen-based approach with phosphorus and potassium fertilizer. However, due to the increasing quantity of nitrogen fertilizer in recent years, insufficient supply of phosphorus and potash fertilizer, and the lack of organic fertilizer sources, the phenomenon of widespread application of chemical fertilizers and nitrogen by the professional households is worsening. This not only breaks the various nutrient elements in the tea plantation soil The balance of the relationship, but also led to the proportion of basal and top dressing tea disorders. According to the study, the proportion of basal and topdressing in the tea area in the middle and lower reaches of the Yangtze River at a ratio of 40:60 is suitable, and the ratio of nitrogen, phosphorus and potassium is 2: 1: 1 in the whole year. However, according to the survey of hilly red soil area, both basal and top dressing ratio