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强化还原处理对海南西瓜连作障碍土壤性质的影响

柯用春1,王爽1,任红1,张金波2,蔡祖聪2**   

  1. 1三亚市南繁科学技术研究院, 海南三亚 572000; 2南京师范大学地理科学学院, 南京 210023)
  • 出版日期:2014-04-10 发布日期:2014-04-10

Effects of intensively reductive treatment on soil properties in a watermelon continuous cropping obstacle field in Hainan Province.

KE Yong-chun1, WANG Shuang1, REN Hong1, ZHANG Jin-bo2, CAI Zu-cong2**   

  1. (1Sanya Science and Technology Academy for Crop Winter Multiplication, Sanya 572000, Hainan, China; 2College of Geography Science, Nanjing Normal University, Nanjing 210023, China)
  • Online:2014-04-10 Published:2014-04-10

摘要:

以海南省三亚市西瓜生长发生障碍的土壤为研究对象,设置对照、淹水、淹水+覆膜、淹水+覆膜+7500 kg·hm-2紫花苜蓿(称为强化还原处理)4个处理,处理时间20 d,研究了强化还原处理对海南西瓜连作障碍土壤物理、化学、生物性质的影响。结果表明:强化还原处理能够明显降低土壤中大土块(直径大于5 mm)的比例,有效改良土壤板结问题;强化还原处理过程中土壤氧化还原电位(Eh)和硝态氮含量快速下降,pH显著提高,铵态氮含量快速上升;土壤中真菌和尖孢镰刀菌数量显著降低;土壤淹水同时添加有机物料的强化还原处理方法可能是改良连作障碍土壤的一种高效、环保的方法。
 

关键词: 生态创新, 环境绩效, 制度理论, 财务绩效

Abstract: In this article, we studied the effects of intensively reductive treatment on soil physical, chemical and biological properties in a watermelon continuous cropping obstacle field in Hainan Province. The experiment contained four treatments, i.e. CK (no flooding), flooding, flooding incorporated with plastic film mulching, and flooding incorporated with plastic film mulching and 7500 kg·hm-2  alfalfa (Medicago sativa L.) (i.e. intensively reductive treatment). The results showed that the percentage of soil large clods (>5 mm) significantly decreased, suggesting that soil structure could be improved effectively by the intensively reductive treatment. The soil Eh value and nitrate concentration decreased rapidly, while the pH value increased obviously during the intensively reductive treatment. After the intensively reductive treatment, fungi and Fusarium oxysporum in soil reduced significantly. Our results indicated that the intensively reductive treatment may be a high efficient and environmentfriendly method to improve the continuous cropping obstacle soil.

Key words: institutional theory, financial performance, environmental performance., eco-innovation