摘要
在滴灌条件下,采用分层取样分析的方法研究施基肥与未施基肥情况下,氮、磷、钾在土壤剖面上的移动情况。结果表明,在试验条件下,氮在土壤中的垂直移动距离可以超过40 cm,磷的移动距离在10 cm以内,钾的移动距离在30 cm以内。受作物根系生长的影响,土壤剖面中氮的变化比较复杂,尤其是施用基肥以后,而磷、钾的移动相对比较稳定,基肥施用与否对磷钾的移动性没有太大影响。由于磷在土壤中的移动性较差,因此,建议在滴灌施肥中,应该以氮、钾为主,磷肥依然应该采用深施为好。
Under drip irrigation condition, the movement of N, P and K on the soil section was studied , adopting the research method of dividing layers to take a sample on conditions that the base manure had been applied and hadn＇t been applied.The result indicated： under this experimental condition, the distance of vertical movement in the soil section of nitrogen could exceed 40 cm, the distance of phosphorus movement was within 10 cm, the distanee of potassium movement was within 30 cm. The change of the nitrogen was more complicated in the soil section because of being affected by the growth of crops root system. Expecially after using the base manure, the movements of the phosphorus and potassium were relatively more steady. Whether the base manure was used or not, it had not too great influence on the phosphorus and potassium movement. Because the movement in the soil of phosphorus was relatively bad, so, was proposed in the drip irrigation was applied the fertilizer, it should take nitrogen, potassium as the core, the phosphorus fertilizer still was adopted in the deep layer to be used better.
出处
《新疆农业科学》
CAS
CSCD
2005年第6期426-429,共4页
Xinjiang Agricultural Sciences
基金
新疆正义农业科技有限公司
关键词
氮磷钾
滴灌
棉田
垂直移动
nitrogen
phosphorus and potassium
drip irrigation
cotton field
movement vertically
