摘要
试验数据表明,氮肥效益的发挥与农田水分状况的关系密切相关,不同的农田水分状况,相同的施肥量所获得的产量是不同的。合理的灌水能够促进肥料的充分利用,氮肥的贡献率随着氮肥量的增加而呈现递减的趋势。不同的分析方法都表明,小水量多次滴灌方式在马铃薯栽培中有利于氮素的吸收,对土壤深层的NO3-N含量影响不大,污染小。在本试验中此灌水方式下,较为理想的施肥量为180kgN/hm2。
The experimental research turns out that nitrogen production efficiency is greatly related to soil moisture condition. The yield of potato varies with different water supplying levels under the same condition of fertilizer. The reasonable method of irrigation can promote to uptake the fertilizer well. Nitrogen contribution rate is decreasing with more fertilizer applied in all treatments. The different analysis method expresses the method of W2 irrigation benefits to the absorption of nitrogen in potato cultivating, and has less Influence to the contain of nitrate and the contamination of environment. With the method of irrigation the ideal quantity applies of fertilizer is 180kgN/hm2 in this experiment.
出处
《琼州大学学报》
2005年第5期49-51,共3页
Journal of Qiongzhou University
基金
国家自然科学基金项目(40261007)
关键词
马铃薯产量
灌水方式
氮肥贡献率
硝态氮
potato yield
method of irrigation
nitrogen contribution rate
nitrate
