马铃薯氮素吸收积累特性与施用技术研究

基金项目:

福建省科技计划重点项目(2005N032);福建省财政专项——福建省农业科学院科技创新团队建设项目(STIF-Y04)

详细信息

Nitrogen Absorption and Accumulation and Fertilization of Potatoes

1.
Agricultural Technology Extension Station of Zhangzhou City,Zhangzhou,Fujian 363000,China;
2.
Rice Research Institute,Fujian Academy of Agricultural Sciences,Fuzhou,Fujian 350019,China;
3.
Agricultural Technology Extension General Station,Fujian Province Department of Agriculture, Fuzhou,Fujian 350001,China

摘要: 为探索马铃薯氮素吸收积累特性与施用技术,在闽东南冬种马铃薯区设置不同施氮水平的田间试验。结果表明,马铃薯全株及块茎的N素积累呈Logistic曲线动态,茎叶干物质积累和叶面积发展动态呈单峰曲线,马铃薯产量、块茎干物质和淀粉积累量均与施N量呈抛物线型相关。在供试条件下,马铃薯目标产量38t·hm-2,平均每生产1000kg鲜薯的吸N量为3.31kg,需施N5.91kg,达到最佳经济效益的经济施N量为239.5kg·hm-2。
- 马铃薯 /
- 氮素 /
- 产量 /
- 叶面积 /
- 干物质 /
- 淀粉
Abstract: Different nitrogen (N) application levels in the winter potato areas in the Southeast Fujian were conducted to explore the characteristics of N absorbtion and accumulation as well as application technology. The results showed that N accumulation in the whole plant and tuber of the potatoes both exhibited a Logistic dynamic curve. The dynamics of leaf area and dry matter accumulation in stems and leaves all showed a single peak curve. The yield, dry matter and starch accumulation of tuber in potatoes all had parabola correlation with N application. Under the tested conditions, the economic N application was determined to be 239.5 kg穐m-2 with an expected yield of 38 t穐m-2. On the average, N absorption and application were 3.31 kg and 5.91 kg for fresh potatoes per 1 000 kg, respectively.
- Potato /
- nitrogen /
- yield /
- leaf area /
- dry matter /
- starch