摘要
在总供氮量不变的情况下,将缓释肥与速效肥按不同的比例混合施用,研究不同施肥处理对油菜生长以及土壤养分的影响。试验过程中,每隔10d测试一次土壤速效氮的含量,60d后测油菜鲜质量、干质量、全氮、全磷、全钾含量及土壤速效氮、磷、钾含量。结果表明:不同施肥处理与CK(不施肥)相比都能提高油菜生物量和土壤中氮、磷、钾含量,并且缓释肥在基肥中所占的比例越大,油菜全氮、全磷、全钾含量越高,凡是有缓释肥的处理,土壤速效氮含量在前期都相对偏低,而在20d之后含量均上升,土壤中速效磷、速效钾含量均与缓释肥添加量呈正相关。缓释肥养分释放速度具有先低后高再低的趋势,其释放高峰期正好可以满足油菜生长需求,因此既可以提高肥效,又可以提高油菜生物量。
The effects of different proportions of slow-release fertilizer and fast-release fertilizer on rape growth and soil nutrients in the condition of the same total nitrogen content were studied with a pot experiment. The results indicated that compared with the CK （no fertilizer used）,an increase in the rape＇biomass,soil nitrogen, phosphorus and potassium content of other treatments were observed,and the larger proportion of slow-release fertilizer in the base fertilizer improved the content of total nitrogen, phosphorus and potassium in rape. The soil nitrogen content of treatments with slow-release fertilizer was low in the early days, but increased after 20 days. Soil phosphorus and potassium contents had positive correlations with the proportion of slow-release fertilizer. The nutrient release rate of slow-release fertilizer was from slow to fast and then slow, and the release peak of slow-release fertilizer just met the nutrient requirement of rape growth, which could not only improve fertilizer efficiency,but also improve rape biomass.
出处
《河南农业科学》
CSCD
北大核心
2013年第3期59-62,共4页
Journal of Henan Agricultural Sciences
基金
烟台市科技攻关项目(2010171)
关键词
缓释肥
速效肥
油菜
土壤养分
slow-release fertilizer fast-release fertilizer rape soil nutrient
