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开垦红壤荒地当年种稻和红壤旱地改水田(简称红壤新辟稻田,下同),在水耕熟化条件下,有利土壤有机质的积累和腐殖质品质的提高,是定向快速培肥,加速土壤熟化,高速度发展红壤丘陵地区农业生产的新途径。但是,在改田的头一、二年普遍发生黑根黄叶生理病害,减产30—60％,严重者甚至颗粒无收。 据初步研究表明,黑根黄叶生理性病害有潜毒型和缺素型两种,本试验研究着重探明潜毒型的发病原因和防治技术。
Under the conditions of hydroponics and maturity, the accumulation of organic matter in soil and the improvement of humus quality are favorable for the cultivation of red wilderness wasteland in that year, and the paddy field and red soil dryland change paddy field (hereinafter referred to as the red soil new paddy field) New Ways to Develop Agricultural Production in Red Soil Hilly Region at High Speed. However, during the first year and the second year of cropland conversion, the physiological diseases of yellow rooted yellow leaf occurred generally, and the yield was reduced by 30-60%. In severe cases, even the seeds were no longer collected. According to the preliminary research, the physiological diseases of yellow root yellow leaf have two kinds of potential poison and deficiency type. This study focuses on the identification of the underlying causes and prevention and cure techniques.