摘要:为了解关中地区小麦－玉米轮作条件下玉米硫素吸收及籽粒产量对不同施硫量的响应，于2011年6月—2011年10月进行单因素硫肥大田试验，设置0、37.5、75、112.5 kg S·hm^-2和150 kg S·hm^-25个施硫水平，研究夏玉米硫素吸收利用效率及干物质积累特征。结果表明：大喇叭口期玉米硫吸收强度最高，达到288.4～378.6 g·hm^-2·d^-1，施硫可提高玉米硫吸收强度。112.5～150 kg S·hm^-2处理显著提高玉米群体干物质积累量；75～112.5 kg S·hm^-2处理显著提高玉米籽粒产量，施硫水平达到150 kg S·hm^-2时籽粒产量有下降趋势。玉米硫肥偏生产力和农学利用率随施硫量的增加而下降；玉米硫肥吸收利用率均在5％以下。结论：夏玉米对硫肥的响应明显，112.5 kg S·hm^-2施硫量是当地夏玉米的适宜施硫量。

关键词:硫  夏玉米  产量  利用

AbstractIn order to study the effects of sulfur application rate on sulfur uptake and grain yield of summer maize in Guanzhong Plain, a single factor (sulfur) field experiment was carried out with five sulfur application rates (0, 37.5, 75, 112.5 kg S·hm^-2, and 150 kg S·hm^-2) during June, 2011 to October, 2011. Sulfur use efficiency and grain yield of maize were analyzed. The results showed that the sulfur uptake rate of maize was improved along with the increase of sulfur application rate, and it peaked at 288.4～378.6 g·hm^-2·d^-1 at large bell stage. High sulfur application treatments (112.5 kg S·hm^-2 and 150 kg S·hm^-2) significantly increased dry matter accumulation of maize at the end of growing season. The grain yield of maize significantly increased under moderate sulfur application treatments (75 kg S·hm^-2 and 112.5 kg S·hm^-2), but tended to decrease when sulfur application rate went up to 150 kg S·hm^-2. The sulfur partial productivity and agronomic efficiency decreased with the increase of sulfur pplication rate, and the sulfur use efficiency of maize in all treatments was below 5%. It was concluded that the response of summer maize to sulfur application was remarkable, and 112.5 kg S·hm^-2 was the optimal sulfur application rate for summer maize under the experimental condition.

Key wordssulfur  summer maize  grain yield  use efficiency

文章编号： 0258_7106 (2016) 01_0018_15 中图分类号： P618.41 文献标志码：A

改回日期：2015_07_11

基金项目

**通讯作者耿新霞， 女， 1979年生， 助理研究员， 成矿规律研究方向。 Email： gen gxinxia@cags.ac.cn