桂糖43号在不同施肥量与种植密度下的生长表现

Effects of fertilizer rate and planting density on yield and its components of GT43

为确定甘蔗品种桂糖43号最佳施肥量与种植密度,为生产上推广种植该品种提供依据。本试验采用施肥量与种植密度两因素裂区试验,施肥量为主区,设3个施用复合肥水平,分别为562.5、1875、2625kg/ha,种植密度为副区,设7.4、9.1、10.5、13.6万芽/ha4个水平,调查各处理甘蔗萌芽率、分蘖率、株高、茎径、有效茎数、产量等性状,分析不同施肥量与种植密度对产量及构成因素的影响。结果表明不同施肥量处理的桂糖43号萌芽率,分蘖率,茎径和公顷有效茎数都没显著差异,低肥处理产量最高。不同种植密度处理产量差异显著,中高种植密度(10.5万芽/ha)产量最高。在施肥量和种植密度互作下,A3B4产量最高。综合成本和经济收入方面,单从施肥量考虑,施复合肥562.5kg/ha收入最高;单从种植密度考虑,下种量10.5万芽/ha收入最高;从施肥量和种植密度互作方面考虑,施复合肥562.5kg/ha,种植密度为9.1万芽/ha收入最高。

The present research was conducted to determine the optimal fertilizer rate and planting density of sugarcane variety GT43 to provide references for extending this variety in sugarcane production. In this experiment,Split-plot experiment with two factors（fertilizer rate and planting density）was designed to investigate sugarcane agronomic traits,such as sprouting rate,tiller rate,plant height,stalk diameter,number of millable stalks,yield,at etc.,for analyzing the effects of 3 fertilizer rates（562.5,1875 and2625 kg/ha）and 4 planting densities（7.4×10~4、9.1×10~4、10.5×10~4、13.6×10~4 buds/ha）on sugarcane yield and its components. The results showed that there were no significant differences in germination rate,tillering rate,stem diameter and number of millable stalks among different fertilization treatments,but the yield of low fertilizer treatment was the highest. Medium-high planting density（10.5×10~4 buds/ha）presented the highest yield in different planting density treatments. The interaction between fertilizer and densities treatments showed the highest yield was A3B4. comprehensive costs and economic income,the fertilizer rate of 562.5 kg/ha presented the highest income while considering the fertilizer alone,the plant density of 10.5×10~4 bud/ha showed the highest income while considering the planting density alone,the fertilizer rate of 562.5 kg/ha and plant density of 9.1×10~4 bud/ha was the highest income while considering the interaction between fertilization and planting density.