芭蕉芋施肥处理对块茎淀粉积累及产量的影响

为探索芭蕉芋块茎生长发育规律及主要影响因素,开展了芭蕉芋肥效试验对淀粉积累及产量影响研究,分别在P、K相同、N、K相同、N、P相同的情况下对N、P、K的4个不同水平处理进行随机区组试验。结果表明:株高、分蘖数在7、8、9、10月是芭蕉芋生长最快的季节,10月后,株高生长缓慢,植株分蘖数基本停止,茎径在10~12月增长较快;干片淀粉率、干物率还是鲜芋淀粉含量积累,9~12月是芭蕉芋块茎淀粉积累较快的时期,到2013年3月测产时,无论干片淀粉率、干物率还是鲜芋淀粉含量都有所下降;在N、P、K肥料3要素的筛选试验结果表明:以N 300 kg/hm2、P(P2O5)180 kg/hm2、K(K2O)240 kg/hm2为最佳组合。

Effects of Fertilizer Efficiency Test on Tuber Starch Accumulation and Yield of Canna edulis

For exploring the growth regularity of Canna edulis tubers and main influencing factors , the author studied the effects of fertilizer （ N, P, K） efficiency test on the tuber starch accumulation and yield of Canna edulis through single-factor randomized block experiment .The results showed that the plant height and tiller number of Canna edulis increased fastest from July to October;after October, the plant height increased slowly , and the tillering stopped basically;the stem diameter grew faster from October to December .The tuber dry matter rate , dry and fresh edulis starch content increased quickly from September to December , but they have decreased to a certain extent in March , 2013.The results of N, P, K fertilizer screening test indicated that the combined ap-plication of N 300 ㎏/hm2 , P （ P2 O5 ） 180 ㎏/hm2 , and K （ K2 O） 240 ㎏/hm2 was the best .