...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Australian Journal of Crop Science >Growth, yield and nutrition of sugarcane ratoon as affected by potassium in a mechanized harvesting system
【24h】

Growth, yield and nutrition of sugarcane ratoon as affected by potassium in a mechanized harvesting system

机译：机械收割系统中钾对甘蔗再生的生长，产量和营养的影响

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Sugarcane mechanical harvest deposes straw residue on the soil surface, increases soil organic matter and improves nutrients cycling, especially potassium (K). The objective of this work was to evaluate the effect of K fertilizer on vegetative growth, mineral nutrition, straw yield and technological quality; i.e., levels of total soluble solids, industry fiber (bagasse), apparent sucrose, juice purity, and reducing sugars in a ratoon sugarcane grown in Oxisol in a mechanized harvesting system. The experiment design was carried out in the 2009/10 cropping season in the state of S?o Paulo, Brazil, in the first regrowth of sugarcane after harvest using cultivar RB 86- 7515. The experimental design was a randomized block with five replicates and five rates of K-fertilizer: 0 (control); 32.5; 65.0; 130.0 and 195.0 kg ha-1 of K2O. Potassium levels in the soil and in the plant, stalk production and the technological quality were evaluated at harvest. The rate of 195 kg ha-1 of K2O increased in 279, 78, 142 and 29% the K exchangeable content in the 0-20 and 20-40 cm layers at 180 and 360 DAS, respectively, increased soil potassium availability and promoted higher absorption of nutrients by plants, reaching 9.8 g kg-1 in leaves; i.e. 22.6% higher compared to the control treatment. The higher absorption of potassium was reflected on yield gain of 28.6% with 147.5 kg ha-1 of K2O. Therefore, 130 kg ha -1 of K2O is the most appropriate rate for the production of stalks of sugarcane grown in an Oxisol within the range evaluated. This rate kept potassium nutritional status very close to the adequate and promoted its accumulation in stalks at levels considered satisfactory to reach high yields in the first ratoon. Potassium fertilization had little effect in the technological quality.
机译：甘蔗机械收割将秸秆残留物留在土壤表面，增加土壤有机质并改善养分循环，特别是钾（K）。这项工作的目的是评估钾肥对营养生长，矿物质营养，稻草产量和技术质量的影响;即在机械收割系统中在Oxisol中生长的再生甘蔗中的总可溶性固形物，工业纤维（蔗渣），表观蔗糖，果汁纯度和还原糖的含量。实验设计是在2009/10种植季节的巴西圣保罗州，使用品种RB 86- 7515在收获后的第一次甘蔗再生中进行的。实验设计是一个随机的试验区，有五个重复试验，钾肥的五种比例：0（对照）; 32.5; 65.0; 130.0和195.0 kg ha-1的K2O。收获时评估土壤和植物中钾水平，秸秆生产和技术质量。 195 kg ha-1的K2O比例分别在180和360 DAS下分别在0-20和20-40 cm层中增加了279、78、142和29％的钾可交换含量，增加了土壤钾的利用率并促进了钾的增加。植物吸收的养分，叶片达到9.8 g kg-1;即比对照治疗高22.6％。钾的吸收更高反映在使用147.5 kg ha-1的K2O时，产量增加了28.6％。因此，在所评估的范围内，对于在Oxisol中生长的甘蔗茎的生产，最合适的速率是130 kg ha -1的K2O。该速率使钾的营养状况非常接近充足，并促进了钾在茎中的积累，其水平被认为足以满足第一个再生稻的高产。施钾对技术质量影响不大。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号