【摘要】 对沈阳地区高粱不同保墒措施下土壤剖面养分状况(包括碱解氮、速效钾、有机质和电导率)进行测定研究,结果表明:不同保墒措施下,土壤剖面碱解氮含量均随土层深度增加呈减少趋势,其中黑膜覆盖增加最大,白膜覆盖次之,秸秆覆盖、施用保水剂依次;土壤剖面速效钾含量均随土层深度增加呈减少趋势,覆膜处理和保水剂处理具有明显的增钾效果,秸秆覆盖増钾作用不甚显著;秸秆覆盖能明显地增加耕层有机质含量,白膜覆盖和黑膜覆盖次之,施用保水剂土壤剖面有机质含量变化不显著;各保墒处理对土壤表层盐分的累积有明显的抑制作用,其中秸秆覆盖抑制效果最明显,黑色地膜、白膜覆盖和保水剂依次。更多还原

【Abstract】 Study on the soil nutrition profile of sorghum,including soil available nitrogen、available potassium 、soil organic matter and soil salinity,under different moisture conservation measures. The results showed that the available nitrogen in the soil depth profiles was decreasing with the soil depth went deeper. The black plastic film had the highest in-crease,and the white plastic film took the second place,straw mulching the third,and then the aquasorb application. The available potassium in the soil depth profiles was decreasing as the depth went deeper. The plastic film and the aquasorb application had a significant effect on increasing the potassium,but the straw mulching did not. All these moisture conservation measures had an inhibition effect on the salt accumulation at the soil surface,and the straw mulching had the most obvious inhibition effect,and then black plastic film,white plastic film and aquasorb application.更多还原