Growth behavior, productivity, leaf rolling, and soil cracks on transplanted rice in response to enforce surface drainage

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• 作者：V. K. Choudhary
• 关键词：Leaf rolling ; Productivity ; Relative water content ; Rice ; Soil cracking
• 刊名：Paddy and Water Environment
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：13
• 期：4
• 页码：507-519
• 全文大小：713 KB
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• 作者单位：V. K. Choudhary (1) (2)
  
  1. Indian Council of Agricultural Research, Research Complex for NEH Region, Basar, 791101, Arunachal Pradesh, India
  2. National Institute of Biotic Stress Management, Raipur, 493225, Chhattisgarh, India
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Agriculture
  Hydrogeology
  Geoecology and Natural Processes
  Monitoring, Environmental Analysis and Environmental Ecotoxicology
  Soil Science and Conservation
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1611-2504

文摘

Intermittent and prolonged dry spell during growth of transplanted rice is an important abiotic problem in north eastern region (NER). However, the productivity of rice in the region is very low, and this is mainly associated with reduced plant population, growth, and yield attributes with lower relative water content and leaf rolling with formation of soil cracks by erratic and aberrant rainfall. Keeping this in view, a field experiment on transplanted rice was conducted during two consecutive years 2011 and 2012 at NER of India, to evaluate the imposition of forced surface drainage (SD) at various growth stages (continuous drainage, SD at tillering, SD at panicle initiation, SD at booting, SD at flowering, SD at milking, and 15 days intermittent SD) and was compared with continuous flooding on growth and yield attributes, yield, relative water content, leaf rolling, and formation of soil cracks. Results revealed that continuous flooding has significant (p < 0.05) improved the plant population, growth and yield parameters, rice grain yield (3,406.7 kg ha?) and straw yield (4,683.3 kg ha?), relative water content maintained >90 %, no leaf roll, and soil crack. However, imposition of SD at tillering has lower tillers hill?, but yield was compensated by improvement in yield attributes. As per the availability of water, growers of the region can utilize the water for scheduling of water and most critical stages can be avoided by moisture stress to obtain higher productivity. Keywords Leaf rolling Productivity Relative water content Rice Soil cracking