田菁(当地称(豆劳)豆)是一种一年生耐盐性较强的优良夏季绿肥,在苏北滨海盐渍土上种植,有改良土壤结构,加速土壤脱盐,增加土壤有机质提高土壤肥力的作用。如新洋试验站1958年在新垦126亩茅草地上,垦后种一季田菁,秋后压青,冬闲,翌年植棉平均亩产籽棉365斤,比不种田菁的增产25%。淮海农场经验,麦茬地种植田菁压青每亩 Tianjing (locally called (bean) bean) is a good summer green manure with strong annual salt tolerance. It is planted on coastal saline soil in North Jiangsu Province, which can improve soil structure, accelerate soil desalination, increase soil organic matter and increase soil fertility Role. For example, in 1958, Xinyang Experimental Station was planted with 126 hectares of cultivated land on reclaimed land of 126 mu. After cultivation, a quarter of cultivated sibiricum was planted. After the autumn, greening and winter fallow were carried out. In the following year, the average cotton yield per mu was 365 kg, an increase of 25% over the non-cultivated cultivars. Huaihai farm experience, the cultivation of wheat stubble Jing green per acre