摘要
应用土壤养分状况系统研究法,对麦玉轮作体系中连续秸秆与NP化肥配施对土壤钾素肥力影响进行长期定位研究.试验表明,秸秆还田对土壤速效钾、非交换钾的影响最大,对矿物钾和全钾的影响很小.在不施任何化学钾肥14～18 a的连续耗竭状态下,秸秆还田能及时补给有效钾的损耗,但却提高了矿物钾的自然释放速率.
Effect of successive straw plus NP on soil K content in wheat/maize rotation system was studied according to the system methods from soil nutrition. The results showed that the effect of straw returning on available K and non-exchangeable K were more notable than mineral K and total K. In the exhausted condition of without K for 14-18 years, straw plus NP could supply with available K timely, but speed up the natural release rate of mineral K.
出处
《西北农业学报》
CAS
CSCD
北大核心
2005年第3期173-176,共4页
Acta Agriculturae Boreali-occidentalis Sinica
基金
国家自然科学基金资助项目(39870524)
