喷施微肥对宿根甘蔗黄白苗的影响初报

Effects of spraying microelement fertilizer on yellow and white plants in ratoon cane

从土壤和植株叶片的营养学角度对宿根甘蔗的黄白苗进行调查研究,结果表明:土壤中有效硼缺乏。在连续3次喷施浓度为0.2%的硫酸锌、硫酸锰、硫酸铁、硼砂、硫酸镁、硼砂+硫酸铁+硫酸锌的营养液后,以喷施硫酸铁的植株转绿快且植株转绿率最高,喷施硼砂的植株转绿率高且叶绿素含量最高,叶片的硼含量与叶绿素含量呈显著的正相关。

Yellow and white plants in ratoon cane were studied in respects of the nutrition of the soil and leaves. The results showed that available boron was lack in the soil. After 3 times of continuous spraying of zinc sulfate, manganese sulfate , ferric sulfate, borax, magnesium sulfate and “borax ＋ ferric sulfate ＋ zinc sulfate” with a concentration of 0.2%, the plants spraying ferric sulfate turned green quickly and the rate for turning green was the highest. The chlorophyll content of the plant of spraying borax was the highest, and the rate of turning green was also high. There was a significant positive correlation between boron content and chlorophyll content of leaves.