• 中文核心期刊
  • CSCD来源期刊
  • 中国科技核心期刊
  • CA、CABI、ZR收录期刊

Message Board

Respected readers, authors and reviewers, you can add comments to this page on any questions about the contribution, review,        editing and publication of this journal. We will give you an answer as soon as possible. Thank you for your support!

Name
E-mail
Phone
Title
Content
Verification Code
Volume 22 Issue 2
Apr.  2012
Turn off MathJax
Article Contents
YAO Bao-quan. Fertilizer Response and Optimum Application Rate of NPK on Sweet Potato[J]. Fujian Journal of Agricultural Sciences, 2007, 22(2): 136-140.
Citation: YAO Bao-quan. Fertilizer Response and Optimum Application Rate of NPK on Sweet Potato[J]. Fujian Journal of Agricultural Sciences, 2007, 22(2): 136-140.

Fertilizer Response and Optimum Application Rate of NPK on Sweet Potato

  • Received Date: 2007-04-02
  • Rev Recd Date: 2007-05-08
  • Publish Date: 2007-06-15
  • The NPK fertilizer response and its optimum application rate on sweet potatoes was studied by field experiments in Fujian.The results showed that on average,the application of N,P,and K on sweet potatoes increased yield by 27.2%,15.8%,and 26.4%,respectively.The rates of the increase were N KP.The weight ratio of big-medium to small sweet potato was 6.7 in a NPK balanced fertilization.It was significantly higher than the N,P or K deficient controls.The output/input ratio of N and K fertilizers was higher in the summer sweet potatoes than in the autumn crop.However,the P fertilizer’s ratio was higher in the autumn.The optimum application rate for N was 168 kg·hm-2,48 kg·hm-2 for P2O5,and 168 kg·hm-2 for K2O,in the ratio of 1:0.3:1.0 on summer sweet potatoes.For the autumn crop,the optimum application rate was 174 kg·hm-2 for N,57 kg·hm-2 for P2O5,and 200 kg·hm-2 for K2O,in the ratio of 1:0.3:1.2.But obviously,the optimum application rate depends largely on the soil type and its fertility.The NPK balanced fertilization increased yield by 14.9% and net income 3600 yuan per hectare over the traditional practice in a higher yield farmland,or increased yield by 12.0% and income by 2200 yuan per hectare in a medium-low yield farmland.
  • loading
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (2412) PDF downloads(715) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return