摘要
采用室内土柱淋溶法,通过模拟降雨,研究了由紫色泥土、草炭、保水剂、消毒剂、微生物肥、尿素、过磷酸钙、硫酸钾等按不同比例配制的2种基质对N、P、K淋溶的影响。结果表明:基质所含养分在同一场次淋溶试验中,淋溶液中N、P、K元素的养分浓度均随降雨时长的增加呈幂函数降低;随着淋溶场次的增加,基质淋溶液中的养分浓度先升高至峰值后逐渐下降并在后期趋于稳定;淋溶液中N、P、K元素的养分损失量与降雨量的关系呈正相关。经综合分析,基质A能更好地保持水土及土壤养分,为人工土壤的发展提供必要的理论依据。
The soil column leaching method indoor,by the purple soil,peat,water retention agents,disinfectants,microbial fertilizer,urea,calcium superphosphate,potassium sulfate,prepared according to the different ratio of two kinds of matrix of N,P and K leaching test were studied by simulated rainfall.The results showed that in the same leaching experiment in each month,nutrient concentration of N,P,K in leaching solution significantly decreased as power function with the increase of leaching time.With the increase of leaching times,the nutrient concentration in the leaching solution the first increased to the peak value and then decreased gradually,it tended to be stable in the late stage.The nutrient loss in the leaching solution increased with the exponential increase of leaching time.According to the synthetic analyses of various factors above,substrate A was better to maintain soil nutrients,which provided the necessary theoretical basis of the development of the artificial soil.
出处
《北方园艺》
CAS
北大核心
2016年第17期179-183,共5页
Northern Horticulture
基金
国家科技支撑计划资助项目(2013BAJ02B03)
