摘要
通过对宿根甘蔗幼苗黄化病发生严重的蔗区的实地调查和采样分析．探讨了宿根甘蔗幼苗黄化发生的原因；并根据调查分析结果，进行了甘蔗黄化苗矫正的田间试验。研究结果表明：（1）宿根甘蔗幼苗黄化病主要发生在酸性较强的土壤上，pH值〈4．50，土壤有效铁、钙、镁元素含量较低。（2）甘蔗体内的活性铁含量低、活性锰含量过高，导致植株体内铁锰营养不平衡，是宿根甘蔗幼苗黄化病发生的主要原因。（3）叶面喷施铁、镁、硼、钙、钾、锌、氮等营养元素均能提高黄化苗的转绿率．其中．以喷施铁的效果最好．其次是镁、硼．
Samples of soil and leaves from normal and etiolated seedling in sugarcane field were collected for nutrient analysis to investigate the pathogenesis of etiolation in sugarcane fields. The verification experiment of etiolated seeding of ratoon sugarcane was carried out. The results showed that the etiolation symptom of young shoot for ratoon sugarcane occurred in the acidic soil （pH〈4.50）, the available Fe, Ca, and Mg contents in the soil were lesser than that of normal field soils. The nutrient imbalance caused by lesser active Fe content and higher active Mn content was the major factor for the seeding etiolation in ratoon sugarcane. The etiolated seedling after spraying Fe, Mg, B, Ca, K, Zn, and N fertilizers could increase the rate of turning green, and the rate of the plants sprayed Fe fertilizer was the highest, the second sprayed Mg and B fertilizers.
出处
《中国糖料》
2014年第1期5-7,12,共4页
Sugar Crops of China
基金
国家甘蔗产业技术体系(CARS-20-3-5)
广西农业科学院科技发展基金项目(桂农科2012JM11)
关键词
宿根甘蔗
幼苗
黄化
矫正
ratoon sugarcane
seedling
etiolation
corrective measure
