摘要
采用土壤培养的方法研究土壤温度、土壤相对含水量对高分子缓释肥氮、磷、钾素释放特性及土壤相关酶活性的影响。结果表明,在(25±0.5)℃和(35±0.5)℃下,40%(PRF40)和60%(PRF60)相对含水量的土壤能够显著提高高分子缓释肥氮素和磷素的释放量,随着土壤含水量的增大,高分子缓释肥氮素和磷素释放量减小,氮磷的释放快慢顺序为PRF60>PRF40>PRF80>PRF100,钾素释放受土壤含水量和温度影响不明显,且氮、磷、钾素释放曲线均可用对数方程描述;土壤含水量下降能够有效提高土壤脲酶和碱性磷酸酶活性,并且促进高分子缓释肥氮、磷素释放。相同土壤含水量下,土壤脲酶活性35℃显著高于25℃,而土壤碱性磷酸酶活性35℃低于25℃。
Soil incubation was adopted to research the effect on N, P, K release characteristics of polymeric slow release fertilizer and soil enzyme activity by soil temperature and moisture. The results indicated that under （25±0.5）℃ or （25±0.5）℃, 40% （PRF40） and 60% （PRF60）, soil relative water content could sig- nificantly increase the release amount of N and P from the polymeric slow release fertilizer. With the increase of soil moisture, the release amount of N and P of the polymeric slow release fertilizer decreased, and the re- lease amount of N and P had an order as PRF60 〉PRF40 〉PRF80 〉PRF100. Besides, the release of K was not significantly influenced by soil temperature and moisture, and the N, P, K release curves could be de- scribed by logarithmic equation. Low tase activity, and effectively promote the same soil moisture, so kaline phosphatase activity soil moisture could not only improve soi the release of N, P from the polymeric 1 urease activity in 35 ℃ was significantly higher th was higher in 25 ℃ than in 35 ℃.
出处
《水土保持学报》
CSCD
北大核心
2013年第6期216-220,225,共6页
Journal of Soil and Water Conservation
基金
山西省科技攻关项目(20130311009-6)
山西省研究生优秀创新项目(20123094)
关键词
高分子
缓释肥
养分释放特性
土壤酶
影响因子
polymer
slow release fertilizer
nutrient release characteristics
soil enzyme activity
impact factors
