【摘要】 为了研究CaO型土壤调理剂施用量对酸化蔗地的调节效果及对甘蔗生长的影响,为合理使用土壤调理剂改良酸化蔗地土壤提供科学依据,在广西扶绥县常年连作的新植甘蔗地,设置CaO型土壤调理剂0(CK)、1500(A)、2250(B)和3000 kg/hm~2(C) 4个施用量水平,调查不同时期蔗地土壤pH和甘蔗株高、茎径及收获期产量性状。结果表明:与CK比较,A、B和C处理的蔗地土壤pH分别提高达到0.74、0.80和0.90,均达极显著差异水平;甘蔗施用CaO型土壤调理剂后,对株高、茎径有促进效应,特别是B处理在2019年7月17日、8月6日、9月18日和2020年1月12日的株高分别比对照提高了31.9、30.2、22.7和27.4cm,达到极显著差异水平;CaO型土壤调理剂对甘蔗蔗糖分和产量具有显著的促进效果,蔗糖分可增加0.51%～0.65%(绝对值),蔗茎产量增加达7.80～9.15t/hm~2。CaO型土壤调理剂能有效提高蔗地土壤pH,促进甘蔗生长,以2250 kg/hm~2施用量较适合。本研究试验结果为CaO型土壤调理剂在土壤酸化蔗区合理施用提供技术参考。更多还原

【Abstract】 In order to provide a theoretical basis for the scientific use of soil conditioner to improve acidified sugarcane field, we studied the effect of CaO soil conditioner on acidified sugarcane field and sugarcane growth. Four levels of CaO soil conditioner, 0(CK), 1500(A), 2250(B) and 3000 kg/hm~2(C), were set up in the new planted sugarcane fields with continuous cropping in Fusui, Guangxi. Soil pH, plant height and stem diameter were investigated at different sugarcane growth stages, and the data of sugarcane yield characters were collected. The results showed that the soil pH of treatment A, B and C increased by 0.74, 0.80 and 0.90 respectively compared with CK, all of which reached extremely significant difference level. After using CaO soil conditioner in sugarcane, plant height and stem diameter at elongation stage were promoted, especially in the four investigated periods, namely July 17, August 6, September 18, 2019 and January 12, 2020, the plant height of treatment B was 31.9, 30.2, 22.7 and 27.4 cm higher than that of the control, reaching a very significant difference level. CaO soil conditioner had significant effect on sucrose content and cane yield, sucrose content increased by 0.51%～0.65%(absolute value) and cane yield increased by 7.80～9.15 t/hm~2. CaO soil conditioner could effectively improve soil pH and promote sugarcane growth, and the best application rate was 2250 kg/hm~2, which provided technical reference for rational application of CaO soil conditioner in soil acidification sugarcane area.更多还原