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红壤山地栽培果树最突出的问题是如何改良土壤结构和提高肥力。有机肥源除了种好夏、冬两季绿肥外,充分利用田边、地角种植多年生绿肥,乃是开辟果园肥源的重要途径。 1982年5月间,我们在临川县红桥镇园艺场驻点进行柑桔低改时,发现该场附近山地、田塍边到处生长一种十分茂盛而健壮的多年生野生植物——大青(鸭公青)。据考查大青系马鞭草科赪桐属落叶性小灌木植物(学名Clerodeadrum cyrtophyllum Turcy),其叶长椭园形,似牛角状,农民俗称“牛角叶”。1982～1985年与紫穗槐作比
The most prominent problem in the cultivation of fruit trees in red soil is how to improve soil structure and increase fertility. Organic fertilizer in addition to good summer and winter green manure, the full use of Tanabe, angle planting perennial green manure, but is an important way to open up orchards fertilizer. In May 1982, when we carried out a low-grade citrus transformation at the horticultural site of Hongqiao Town, Linchuan County, we found a rich and robust perennial wild plant growing around the ridge near the farm - Daqing Duck male green). According to test Daqingxinsaceae Verbenaceae is a deciduous Shrub shrub (scientific name Clerodeadrum cyrtophyllum Turcy), its long oval-shaped leaves, like horns, farmers commonly known as “horns.” 1982 to 1985 compared with Amorpha fruticosa