黑龙江省共青农场耕地土壤养分变化研究

通过对2009～2010年共青农场3万hm2耕地采集的3 000个土壤样品中大量元素进行分析,初步摸清共青农场土壤的养分水平。结果表明：土壤碱解氮（水解性氮）含量主要集中在100～250mg.kg-1,土壤有效磷含量主要集中在10～40mg.k-g1,土壤速效钾含量主要集中在50～250mg.kg-1,土壤有机质含量主要集中在20～50g.kg-1,土壤pH主要集中在5.5～6.5。与20世纪80年代相比较,有机质、速效氮、有效磷、速效钾的养分都有所提高。并建议在配方肥制定过程中可适当降低磷肥的配比量,在各养分含量较高地块可尝试不施或少施用化肥。

Change of Soil Nutrient of Farmland in Gongqing Farm of Heilongjiang

According to 3 000 soil samples collected from Gongqing Farm in 2009 and 2010,the large number elements were analyzed and the soil nutrient levels in Gongqing Farm were made sure.The results showed that the soil alkaline nitrogen（hydrolysis of nitrogen） content focused on 100~250 mg · kg-1,soil available phosphorus content mainly concentrated in 10~40 mg ·kg-1,soil available potassium content mainly concentrated in 50~250 mg ·kg-1,soil organic matter content mainly concentrated in 20~50 g ·kg-1,soil pH mainly concentrated in 5.5~6.5.Compared to the levels in the 1980s,the organic matter,quick-impact of nitrogen,phosphorus and potassium available nutrients were increased.The suggestions were recommended that may be appropriate to reduce the phosphate fertilizer ratio in formula fertilizer-making process,try applying a little or no chemical fertilizer in high level soil nutrient farmland.