【摘要】 以桂糖21号、桂糖26号、桂糖27号和桂糖28号为试验材料,设4个种植密度水平,研究不同种植密度对4个甘蔗品种农艺性状及产量的影响。结果表明,种植密度越高,桂糖26号和桂糖27号的公顷有效茎数越多,桂糖21号和桂糖28号在种植密度为15万芽/ha时公顷有效茎数最多;桂糖21号在种植密度为15万芽/ha时产蔗量和含糖量最高,桂糖26号、桂糖27号和桂糖28号在种植密度为12万芽/ha时产蔗量和含糖量最高;在中等土壤肥力下,桂糖21号、桂糖26号、桂糖27号和桂糖28号种植密度以9万～12万芽/ha为宜;种植密度过高时,桂糖28号显著减产;不同种植密度对甘蔗的蔗糖分影响不大。更多还原

【Abstract】 The present experiment has been conducted to study the effects of different planting densities(9×104,12×104,15×104,18×104 buds/ha) on agronomic characters and sugar content of four sugarcane varieties,viz.,Guitang 21(GT 21),Guitang 26(GT 26),Guitang 27(GT 27) and Guitang 28(GT 28).The results showed that the number of effective stalks in varieties GT 26 and GT 27 increased with increasing the planting densities,while they were highest at the planting density of 15×104 buds/ha in varieties GT 21 and GT 28.The variety GT 21 recorded highest cane yield and sugar content at 15×104 buds/ha density,while in varieties GT 26,GT 27 and GT 28,it was highest at 12×104 buds/ha density.Under the moderate fertility conditions,all of these varieties were found suitable for planting with the density of 9-12×104 buds/ha.The cane yield of GT 28 decreased significantly with high planting density,however,the sucrose content did not differed significantly at different planting densities.更多还原