秭归县玉米产量及施肥现状调查与分析

对秭归县玉米产量和施肥现状进行了调查。结果表明，秭归县玉米主栽区普遍使用一定比例的农家肥，化肥以尿素和复合肥为主，复合肥以25%养分含量复合肥为主，其中10-7-8的复合肥占比例较大。氮最低用量为156 kg/hm2，最高为320.25 kg/hm2，平均施氮量234.4 kg/hm2。基肥氮占总氮19.45%~52.08%，平均37.2%，苗期追施氮占总氮18.71%~43%，平均26.67%，灌浆期（穗肥）追施氮占总氮26.93%~47.23%，平均36.1%。氮磷钾使用比例为N:P2O5:K2O=1:(0.13~0.43):(0.13~0.43)，平均N:P2O5:K2O=1:0.23:0.26。产量在4350~7200 kg/hm2情况下磷钾肥用量与产量之间达到极限著正相关；产量在7800~8250 kg/hm2情况下各个时期使用的氮肥与产量呈显著正相关。此次调查显示氮肥施用量基本合理，磷钾肥用量稍显不足，可通过适当提高磷钾肥用量增产。

Investigation and analysis on Maize yield and fertilizer actuality in Zigui county

The maize yields and fertilizer actuality of Zigui county were investigation and analysis.The results showed that employed proportion farmyard manure was very universality in main maize production region of Zigui county,Yichang.The fertilizer by mainly consists of urea and compound manure,and compound manure by mainly consists of 25% nutrient content and that the 10-7-8 was dominate.N application lowest was 156 kg/hm 2 ,and the highest was 320.25 kg/hm 2 ,the average N application was 234.4 kg/hm 2 .Rate of...