---

作 者 ：夏玮,张文清*,赵显峰,王文青

期 刊 ：生态学报 2009年 29卷 8期 页码：4560~4564

关键词：甲壳素；包裹尿素；蒸汽压；土壤水分；温度；土壤pH值；释放特性；

Keywords:chitin, coated urea, water vapor pressure, soil moisture, temperature, soil pH, release characteristic,

摘 要 ：探讨了土壤中水分、温度、pH值及水蒸气压、介质盐分浓度对甲壳素包裹肥料(CCF)养分释放特性的影响。结果表明：CCF具有良好的缓释效果，养分释放速率与包裹层内水蒸气压差呈线性关系； CCF的养分释放速率随介质盐分浓度的增高而降低，随着土壤水分的增加而增大，并随着温度的升高而增大，温度每提高10℃，养分释放速率提高约1.3~1.4倍，但不同温度下养分累积释放曲线具有相似性和规律性。土壤pH值对CCF养分释放速率的影响不显著。

Abstract:The experiments for nutrient release of chitosan coated slow release fertilizers (CCF) were carried out to elucidate the effects of soil moisture, temperature, and soil pH, water vapor pressure and ion concentration on nutrient release characteristic of CCF. The results showed that CCF was a good slow\|release fertilizer. The nutrient release rate was linearly related to the water vapor pressure, and it was decreased with the increase of the ion concentration of liquid medium. With the increase of soil moisture, the nutrient release rate was increased Nutrient release rate of CCF was increased with the increasing incubation temperature, and when the temperature enhanced every 10℃, the nutrient release rate would enhance approximately 1.3-1.4 times. However, the cumulative release curves of CCF at the different temperature were of similarity and regularity. The effect of soil’s pH on the nutrient release rate of CCF was not significant.

---