滴施外源钙对香蕉生长及矿质营养吸收的影响

通过盆栽试验研究在滴灌施肥条件下,施用不同水平Ca(NO3)2对香蕉生长、生物量积累及不同部位矿质营养吸收的影响。试验设5个处理,每处理4次重复。结果表明:在试验条件下,滴施不同水平Ca(NO3)2对香蕉叶片长度、假茎高度影响显著,但对叶片数、叶片宽度、假茎围长度等农艺性状指标影响不显著。滴施不同水平Ca(NO3)2对香蕉叶片、根系及整株生物量的影响显著,其中,施钙处理整株香蕉生物量的增量为5.78%～10.59%。滴施不同水平Ca(NO3)2显著增加香蕉根系的总根长和根表面积,其增幅分别为8.61%～47.35%和11.77%～28.17%。不同施钙处理对香蕉叶片、假茎、根系等各部分矿质营养吸收产生一定影响,但规律性不明显。

Effect of Calcium Treatment by Means of Drip Fertigation on Growth and Absorption of Mineral Nutrients in Banana

A pot experiment was carried out to evaluate the effects of supplying different rates of Ca(NO3)2 by means of under fertigation on the growth,changes of agronomic characteristics,root system parameters and absorption of mineral nutrients of banana.Five treatments were set up.The results obtained were as follows: under the conditions of this experiment,it was verified that there were no effects of Ca(NO3)2 application on leaf numbers,leaf width and pseudostem girth of banana,but there were significant effects on leaf length and pseudostem height.Calcium drip fertigation could significantly promote the biomass of banana(the leaf,root and total biomass),the total biomass increase rate was from 5.78% to 10.59%.At the same time,the root length and root surface area increased significantly under drip fertigation,the increased data were 8.61%-47.35% and 11.77%-28.17%.The treatment of calcium drip fertigation had some effects on the mineral nutrients concentriation with different parts——leaf,pseudostem and root of banana.