摘要
对宁夏中部干旱带旱地覆膜免耕种植马铃薯的水氮补施效应进行了研究,结果表明:在仅施用氮肥的情况下,随补灌量的增加植株长势增强,产量、产值增加,水分生产效率和氮肥利用率均提高,但淀粉含量有所下降。在补灌225 m3/hm2时,以150 kg/hm2为最佳氮肥施用量,在补灌450 m3/hm2时,以氮肥225 kg/hm2为最佳施用量,均可获得最佳经济效益、水分利用效率、氮肥利用效率,并且显著提高马铃薯淀粉含量。
A study of the water and nitrogen supplementary application effect of mulch no-tillage dlyland potato in arid area in central Ningxia was made. The result shows that under the condition of applying only nitrogen fertilizer, along with the increase of the supplementary irrigation quantity the plant growth was enhanced, the yield and product value were increased and water production efficiency and the utilization rate of nitrogenous fertilizer were improved but the starch content was decreased to some extent. With a supplementary irrigation quantity of 225 m3/hm2 the optimum application amount of nitrogen is 150 kg/hm^2 and with a supplementary irrigation quantity of 450 m^3/hm^2 the optimum application amount of nitrogen is 225 kg/hm^2 and thus the economic benefit, water use efficiency and nitrogen use efficiency are optimum and the starch content of the potato is upgraded significantly.
出处
《宁夏农林科技》
2012年第12期96-98,100,共4页
Journal of Ningxia Agriculture and Forestry Science and Technology
基金
宁夏回族自治区十二五科技攻关项目"中部干旱带旱地一膜多季低碳农业关键技术研究与示范"
关键词
覆膜免耕
马铃薯
水氮效应
Mulch no-tillage
Potato
Water and nitrogen effect
