摘要
采用田间小区试验,研究了不同缓释有机复肥对夏玉米产量和氮素利用效率的影响。结果表明,以污泥滤饼(沼渣)为主要有机原料生产的胶结型、胶结-包膜型和混合型(30%胶结型缓释肥+70%胶结-包膜型缓释肥)有机复肥较等氮等磷等钾养分用量的常规施肥(化肥+有机肥)分别增加夏玉米产量7.9%、14.9%和20.1%,分别提高氮素利用率8.5、18.0和25.3个百分点,分别提高氮素农学效率0.71、1.33和1.77倍。本试验条件下,混合型缓释有机复肥能保证养分释放动态与夏玉米需肥规律基本吻合,因而增产效果最好,并显著提高了氮素利用效率。
This study was conducted to determine the effect of the different slow release organic-chemical complex fertilizers on summer corn yield and nitrogen use efficiency by field experiment. The results showed that significant increase in yield and nitrogen use efficiency by the different slow release organic-chemical complex fertilizer application was found. Compared with the conventional fertilization （combined application of organic manure and chemical fertilizers） with respective same ap- plication rates of N, P205 and K20, the felted slow release organic-chemical complex fertilizers （T3）, the felted and coa- ted slow release organic-chemical complex fertilizers （T4）, and the fehed and coated slow/controlled release organic-chemi- cal complex fertilizers （TS： 30% T3 ＋ 70% T4） respectively increased by 7. 9%, 14. 9% and 20. 1% for summer corn yield, 8.5, 18.0 and 25. 3 percentage point for nitrogen recovery rate, and 71%, 133% and 177% for agronomic effi- ciency. Time asynchronous of nutrient supply and demand was one of the most important factors contributing to high effec- tiveness of the felted and coated slow/controlled release organic-chemical complex fertilizers and its high nitrogen use efficiency under this condition.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2013年第2期42-45,共4页
Soil and Fertilizer Sciences in China
关键词
缓释有机复肥
夏玉米
产量
氮素利用效率
slow release organic-chemical complex fertilizers
summer corn
yield
nitrogen use efficiency
