中国水稻科学

中国水稻科学

• 研究报告 • 上一篇    下一篇

不同含水量条件下稻田土壤中杀虫剂的生态影响

廖 敏; 黄昌勇 *; 谢正苗   

  1. 浙江大学 环境与资源学院 资源科学系，浙江 杭州 310029； * 通讯联系人，E-mail:chyhuang@zju.edu.cn
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2001-04-10 发布日期:2001-04-10

Ecological Effects of Insecticide Under Different Moisture Levels in Paddy Soil

Abid SUBHANI; LIAO Min; HUANG Chang-yong; XIE Zheng-miao   

  1. (Natural Resource Sciences Department; College of Environment and Resource Sciences; Zhejiang University; Hangzhou 310029; China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2001-04-10 Published:2001-04-10
  • Contact: HUANG Chang-yong

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被引次数

17

摘要： 在控制条件下，研究了不同含水量（风干土、50%和100%田间持水量、淹水状态），加与不加杀虫剂（三唑磷田间施用量），对稻田土壤部分性质的影响。含水量对土壤电子运输系统活度（ETS）/脱氢酶、总酚、蛋白质、磷脂含量产生显著影响， 但杀虫剂的加入不产生显著变化。ETS和总酚含量随含水量增加呈线性上升趋势。与不加杀虫剂对照相比，在所有含水量条件下，ETS略有降低，低含水量时稍明显；总酚的含量略有增加，但不显著。蛋白质不受杀虫剂影响。50%田间持水量时，土壤蛋白质有所降低，表明此时有较强的N矿化作用。50%田间持水量时磷脂含量达最大值，之后随含水量增加直线下降；在淹水条件下，磷脂含量最低。与不加杀虫剂对照相比，在较低含水量时，磷脂含量略有减少。上述研究也说明50%田间持水量时对微生物活性最适宜。

关键词: 含水量, 杀虫剂, 电子运输系统活度, 总酚, 蛋白质, 磷脂, 水稻土

Abstract: The effect of different moisture levels, i.e. air dried soil (AD), 50% water holding capacity (50%WHC), 100%WHC and flooded soil (FS), with and without addition of insecticide (triazophos at field rate, FR), on some selected soil properties in a paddy soil were studied. The results indicated that the different moisture levels caused significant effects on the soil biochemical properties, while addition of insecticide did not produce any significant change. A consistent and linear increase in electron transport system (ETS) activity and phenol contents was recorded with increasing moisture level. Insecticide incorporation caused slight decrease in ETS activity at all moisture levels, more pronounced at lower moisture levels, as compared to the control (moisture only). The phenol contents slightly increased with insecticide application at all moisture levels. The soil protein contents, at all moisture levels, were found to be unaffected between both the soil treatments (moisture only and moisture + insecticide). However, among different moisture levels, reduced quantities of proteins were estimated at 50% WHC, suggesting more N mineralization. The maximum phospholipid quantities that were found at 50% WHC level declined linearly with increasing moisture contents and the minimum contents, with or without insecticide, were estimated in flooded soils. Slight reductions in phospholipid contents that were more pronounced at lower moisture levels, with insecticide addition, were noticed against the untreated soils. The optimum moisture level for microbial activities was found to be at 50% WHC.

Key words: moisture, insecticide, electron transport system activity, total phenol, protein, phospholipid, paddy soil