甘肃河西绿洲灌漠土土壤肥力演变及长期施肥效应  

Long-term fertilization effect and change of irrigation and desert soil fertility in the oasis of Hexi(Gansu) Corridor

作　　者：侯格平 索东让 

机构地区：[1]张掖市农科所,甘肃张掖734000

出　　处：《磷肥与复肥》2007年第1期65-68,共4页Phosphate & Compound Fertilizer

基　　金：甘肃省科学事业费项目(QS031-C31-13)

摘　　要：1982～2002年连续21年8项处理的施肥长期定位试验,研究了土地生产力及肥料效应变化,土壤养分变化及肥料培肥效果,土壤养分收支平衡及肥料养分主要去向,提出该地区农田养分平衡率及施肥结构。结果表明:氮磷肥在作物增产措施中起主导作用,同时如果不施任何钾肥长期种植农作物,土壤速效钾会明显下降;有机肥虽然有机质和氮素含量有限,但长期连续使用有较明显的增产效果,使用时间越长,增产效果越明显。A long-term location experiment （21 years during 1982-2002 ） was finished for the study of soil fertility and fertilizer effects, soil nutrient changes and fertilizer effect, nutrients balance and nutrients movement, aiming at an adequate nutrients distribution and fertilizer input. In the area, nitrogen and phosphate fertilizers are proved fundamental in yield increase. If no potassium applied, soluble potassium in soil will decrease quickly. Little as the content of organics and nutrients in mature fertilizer is, obvious effects on yield increase will occur, when applied for many years.

关 键 词：河西走廊 长期定位试验 土壤肥力 施肥效应 

分 类 号：S158[农业科学—土壤学] S147.2[农业科学—农业基础科学]