不同灌溉施氮肥方式对香蕉根系生长的影响

Effect of nitrogen fertilizer fertigation on the growth of banana root system

试验通过在渗滤池中种植香蕉,研究了滴灌施氮肥和浇灌施氮肥两种施肥方式对香蕉根系生长的影响。结果表明,合理施用氮肥能显著促进香蕉根系的生长,如在滴灌施氮肥条件下香蕉二级根的根表面积比对照增加了52%;对香蕉而言,滴灌施肥技术是一种理想的灌溉施肥方式,与浇灌施肥相比,它能显著增大香蕉二级根的根表面积,其增幅达15%。

The main objective of the study was to evaluate the effects of applying with nitrogen fertilizer as basal dressing or drip fertigation on the growth of banana root system. These parameters of banana root system, such as root number and diameter of the first lateral roots, total mot length and surface area of the feeding roots, and so on, were calculated and measured. The results ob- tained were as follows： It was cou/d increase the growth of banana roots on condition that using nitrogen ferti/izers reasonable by basal dressing or drip fertigation, for example, there had an increase of 52% on the surface area of the banana feeding roots under drip fertigafion comparing with the treatment of CK; Furthermore, compared with basal dressing nitrogen fertilizer, drip fertigation could significantly increase the surface area of the banana feeding roots, there had an inca＇ease of 15 %.