土壤有机质含量与玉米生产力的关系

Relationship Between Black Soil Organic Matter Content and Corn Productivity

土壤有机质是土壤肥力的重要指标。本文通过空间移位的方法,将东北黑土带由南向北5个点有机质含量为18.1g kg-1、31.1g kg-1、54.6g kg-1、103.9g kg-1、53.6g kg-1的农田黑土,分别移至黑龙江省的海伦市和吉林省的德惠市的两种气候下,通过田间试验的方法,研究了黑土有机质含量与玉米生产力的关系。结果表明,在相同的施肥条件下,土壤有机质含量与玉米产量间不存在显著相关关系,产量差异不显著;施肥对各种有机质含量的黑土均有显著增产作用,增产幅度在12.3%～64.1%,黑土带的南部区域德惠市的施肥增产作用要明显高于北部区域海伦市的增产作用。

Soil organic matter content is one of the important soil fertility indicators. The relationship between black soil organic matter content and corn productivity was studied by a soil removal field experiment, in which the soil samples with five different organic matter contents （18.1, 31.1, 54.6, 103.9, and 53.6g kg^-1） were collected and moved to Hailun city of Heilongjiang province and Dehui city of Jilin province, respectively. Results showed： there was no significant relationship between the black soil organic matter content and corn productivity in a same fertilizer management system; Fertilizer application greatly increased corn yield, no matter how much organic matter were. Fertilizer application could increase the production by 12.3 to 64.1 percent of corn yield, but the yield increase ratio was greater in south Dehui than that in north Hailun.