摘要
对恩施市玉米产区施肥现状进行了调查,对其土壤肥力状况进行了分析。结果表明,恩施市玉米氮肥施用量差异较大,平均值为每公顷298.5 kg,随着氮肥施用量的增加产量有增加的趋势;玉米氮(N)、磷(P2O5)、钾(K2O)施用量之比平均为1.00∶0.20∶0.13,远远低于正常水平1.00∶0.40～0.50∶0.40～0.50,钾肥和磷肥的施用量明显偏低,可能是高施氮肥群体产量不高的主要原因;该区域土壤有酸化的趋势,表现为弱酸性土壤的面积与20世纪80年代初比较明显增加;土壤的供氮能力较强,供磷能力较低,土壤供钾能力呈现区域间的不平衡,土壤水溶性硼和交换性锌含量较丰富。
The corn fertilization and soil fertility status in Enshi were studied. The result showed N application of corn varied greatly among the farmers in Enshi with the average of 298.5kg.hm^-2. The average ratio of N, P2O5 and K2O applied to corn was 1.00：0.20：0.13, and P2Os and K20 was much lower than the recommended level （N： P2O5 ：K2O =1.0：0.4-0.5： 0.4-0.5）, which might be the main cause that the yield was not correspondingly high with high rate of N fertilizer. It was found that the area of weak acid soils was increased obviously compared with that in early 1980s. High soil N fertility, low soil P fertility, unbalanced soil K fertility among different townships, relatively high content of water-soluble B and exchangeable Zn were also observed.
出处
《湖北农业科学》
北大核心
2009年第9期2095-2098,共4页
Hubei Agricultural Sciences
基金
湖北省农业科技创新中心资助项目(2007-620-001-03)
关键词
玉米
施肥现状
土壤肥力
恩施市
corn
fertilization status
soil fertility
Enshi
