红萍钾对水稻的有效性
THE AVAILABILITY OF AZOLLA-POTASSIUM FOR RICE
-
摘要: 应用示踪技术研究红萍钾对水稻的有效性。试验结果表明,红萍压入土壤后在最初7天内即释放出65.8%的钾素,满足水稻早期钾素营养需要。所以红萍钾对水稻的肥效可达40%,略高于同量的化肥钾。因此我们认为,无论从富钾潜力或是供钾能力考虑,红萍确是一种值得重视的生物钾肥资源。Abstract: Availability of azolla-potassium for rice was studied with radioactive tracer. The results of experiment showed that azolla released 66% potassium in the first seven days after azolla pressed into soil, The utilization rate of azolla-potassium for rice could reach 40%, which was a little higher than the efficiency of the same amount of potassium in chemical fertilizer. It was thought whether in potential capacity of absorbent potassium or in the capability of supplying potassium azolla was an important resourse of living things supplying potassium.
-
[4] 王方维等,1987,细绿萍作为北方水田绿肥的供肥特征研究。土壤通报18(5):217-220 [6] K. Mengel, 1980,作物生产中的钾。土壤学进展1984.3:15-25
点击查看大图
计量
- 文章访问数: 1731
- HTML全文浏览量: 121
- PDF下载量: 538
- 被引次数: 0