摘要
研究了2种灌水水平、3种石灰水平和3种镁肥水平对玉米干物质积累及镁(Mg)素利用的影响。结果表明,灌水能提高玉米干物质积累和玉米对Mg的吸收;施用石灰不明显影响玉米干物质积累,但降低玉米对Mg的吸收,增加土壤对Mg的固定,对Mg肥表观有效率的影响因施用量不同而有所不同。施用Mg肥在一定程度上提高玉米干物质积累,明显增加Mg的吸收和土壤交换性Mg含量。因此玉米对Mg的吸收利用不仅受到土壤Mg供应水平的制约,而且也受到灌水、施用石灰等因素的影响。
Effects of two irrigation levels,three lime levels and three Mg fertilizer levels on dry mass accumulation and Mg utilization of maize were investigated.Results showed that irrigation enhanced dry mass accumulation and Mg uptake of maize.Lime did not affect the dry mass accumulation significantly,but reduced Mg uptake and increased soil Mg fixation.The effect of lime on Mg apparent recovery fraction varied with the lime level.Applied Mg fertilizer increased the dry mass accumulation of maize to some extent and enhanced Mg uptake and soil exchangeable Mg content significantly.Thus Mg uptake and utilization of maize could be affected not only by soil Mg level,but also by irrigation and lime etc.
出处
《土壤》
CAS
CSCD
北大核心
2010年第6期952-959,共8页
Soils
基金
国家自然科学基金项目(50869001)资助
关键词
灌水
石灰
镁肥
镁有效性
干物质积累
Irrigation
Lime
Mg fertilizer
Mg availability
Dry mass accumulation
