摘要
2012—2013年在济宁市鱼台县,通过大田试验研究了速效氮肥和控释氮肥在0、100、200、300 kg·hm-2 4个氮素水平下对洋葱-棉花套作体系产量及土壤氮素含量变化的影响。结果表明:氮素用量200、300 kg·hm-2时,速效氮肥和控释氮肥处理棉花产量显著高于氮素用量100 kg·hm-2处理;氮素用量100、200 kg·hm-2时,控释氮肥棉花产量较速效氮肥处理分别显著增加17.3%和7.7%;施氮200 kg·hm-2的控释氮肥处理较氮素用量100 kg·hm-2的控释氮肥处理的籽棉显著增产14.5%,但与施氮300 kg·hm-2的控释氮肥处理相比差异不显著。控释氮肥较速效氮肥更能提高0~20 cm土层NO-3-N的含量,但对土壤中NH+4-N含量无显著影响。施用控释氮肥能够提高洋葱和棉花产量,施氮量为200 kg·hm-2的控释氮肥处理为本试验条件下的最优施肥处理。
Controlled-release nitrogen fertilizer(CRN)could meet plants′ demands for nitrogen while reducing nitrogen losses and thus water pollution. A field experiment was conducted in Jining city, Shandong Province, from September 2012 to October 2013, to study the crop growth and soil nitrogen levels in onion and cotton intercropping system under common fertilizer(CN)and CRN at four nitrogen(N)rates of0, 100, 200, and 300 kg·hm-2. Results showed that the cotton yield increased with N applications. At 200 and 300 kg·hm-2, the cotton yields were respectively 17.3% and 7.7% higher in CRN than in CN. In CRN treatments, the cotton yield at 200 kg·hm-2was 7.7% and14.5% higher than that at CN(200 kg·hm-2)and CRN(100 kg·hm-2), respectively. However, no difference was found in the cotton yield between 200 kg·hm-2and 300 kg·hm-2CRN treatments. At 100, 200, and 300 kg·hm-2, onion yields were respectively 19.6%, 2.6% and6.7% higher in CRN than in CN. Soil NO-3-N concentrations in 0~20 cm in CRN treatment were significantly lower than in CN treatment. Soil NH+4-N contents were not affected by N treatments. These results suggest that 200 kg·hm-2of CRN would be an optimum fertilizer rate under the experimental condition.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2015年第4期745-752,共8页
Journal of Agro-Environment Science
基金
山东省现代农业产业技术体系棉花创新团队项目(鲁农科技字[2012]26号)
“十二五”国家科技支撑计划(2011BAD11B01
2011BAD11B02)
国家“948”重点项目(2011-G30)
关键词
氮肥类型
氮肥用量
洋葱产量
棉花产量
土壤氮含量
nitrogen fertilizer type
nitrogen rate
onion yield
cotton production
soil inorganic nitrogen