期刊论文

Fertilizing Efficiency of Middle-late Rice under Tobacco-rice Rotation System in Jinchenshi Town

中文

湖南农业科学

1006-060X

2013

07

61-64

10.3969/j.issn.1006-060X.2013.07.018

湖南省烟草公司邵阳市公司项目（12143）；

本校为第一机构

2012年在湘中丘陵区的邵阳市金称市镇,选择烟稻轮作制下不同母质发育的稻田,采用"3414"试验方案开展晚稻的田间施肥试验,研究了不同施肥处理对烟稻轮作制下晚稻产量的影响。结果表明:不同试验点晚稻产量的地力贡献差异较大,介于38.5%~82.3%;施氮肥、磷肥具有明显增产效果,平均增产分别达53.5%和11.3%,单位养分增产分别为13.5 kg/kg和9.9 kg/kg,但施钾肥增产效果偏低,平均增产仅5.2%,单位养分增产2.4 kg/kg,部分小区甚至出现减产现象。随着氮磷钾施用量的增加,晚稻产量总体上呈现先增加后降低的趋势。基于一元二次方程模型,估算的最佳经济施肥量分别为N 160.7 kg/hm2,P2O537.1 kg/hm2,K2O40.3 kg...

In order to study influences of different fertilizing treatments on yield of late rice under tobacco-rice rotation system,the fields developed from different mother materials under tobacco-rice rotation system in Shaoyang city were chosen to conduct field fertilizing experiments with "3414" method in 2012.The results showed that the fertility contribution for yield of late rice had relatively huge difference between different experiment sites,which was between 38.5% and 82.3%.Applying nitrogen fertilizer and phosphor fertilizer had obvious yield increasing effects that the yield increased by 5...