论文部分内容阅读
为了探讨控释氮肥对油菜的肥料效应,通过池栽试验,选取洞庭湖区3种主要土壤在连续4年“稻-稻-冬闲”后将冬闲改种油菜施用旱作控释氮肥,研究控释氮肥对油菜产量、农艺性状和土壤肥力的影响。结果表明,在紫潮泥及河沙泥2种土壤中施用控释氮肥促进了油菜植株的生长发育,可获得较高油菜产量,比施等N量尿素处理分别增产12.2%和9.8%,70%控释氮肥效果明显降低。施用控释氮肥后河沙泥土壤碱解氮和有机碳含量比油菜试验前分别增加25.0%和3.2%,紫潮泥碱解氮含量提高13.5%,并均高于尿素和70%控释氮肥2个处理。而红黄泥施用控释氮肥对油菜产量和土壤肥力的影响均不及等N量尿素处理,70%控释氮肥处理的效应则更小。施用控释氮肥对紫潮泥及河沙泥的油菜生产具有显著增产效果及土壤氮素肥力提升作用。
In order to investigate the effect of controlled release nitrogen fertilizers on rapeseed, three types of soils in Dongting Lake area were selected as control and released nitrogenous fertilizer after four years of continuous paddy-rice-winter idling Effect of Controlled Release Nitrogen Fertilizer on Yield, Agronomic Traits and Soil Fertility of Rape. The results showed that the application of controlled release nitrogen fertilizer to the two kinds of soils of purple tide mud and river sand promoted the growth and development of rapeseed. The higher rapeseed yield was obtained, which increased by 12.2% and 9.8%, respectively, % Controlled release nitrogen effect was significantly reduced. After application of controlled release nitrogen fertilizer, the content of soil available nitrogen and organic carbon in river sand increased 25.0% and 3.2%, respectively, and that of purple mud increased 13.5% and higher than that of urea and 70% of controlled-release nitrogen fertilizer 2 processing. However, the effect of controlled release N fertilizer on the yield and soil fertility of rapeseed was not as high as that of N and urea, while the effect of 70% controlled-release N fertilizer was less. The application of controlled release nitrogen fertilizers had significant effects on the rape production of purple tidal mud and river sand and the enhancement of soil nitrogen fertility.