不同抗旱处理对甘蔗一代种茎的影响

Effects of Different Drought Resistance Treatments on the First Generation Stem of Sugarcane

测定包衣处理及抗旱剂处理后的甘蔗一代种茎在自然干旱及复水后的农艺性状变化,阐明种子包衣及抗旱剂处理对甘蔗一代种茎抗旱中生理机理的影响,为甘蔗一代种茎抗旱种植研究提供参考依据。试验设3组9个处理,分别为对照组:正常供水A组(CKA)、正常干旱及复水(CKB);包衣组:壳聚糖包衣膜(SC1)、PE塑料膜(SC2)、透气PET材料包覆(SC3);抗旱剂组:聚丙烯酸铵(D1)、聚丙烯酸钠(D2)、黄原胶(D3)、瓜尔豆胶(D4)、3.9648 mg/L(分子量264.32,15μmol/L)ABA(D5)、2000 mg/LCaCl_(2)溶液(D6)、200 mg/L乙烯利溶液(D7)。结果显示:短期干旱,如干旱10天后,抗旱剂组D1、D2、D4、D5、D6和D7处理及包衣组SC1和SC2处理均能保证甘蔗一代种茎的有效生长;长期干旱,如干旱20天后,抗旱剂组D1、D6和D7处理依然能保证甘蔗一代种茎的有效生长;复水10天后,抗旱剂组D1、D5、D6和D7处理依然能保证甘蔗一代种茎的有效生长。由此得出结论:聚丙烯酸铵、2000 mg/L CaCl_(2)溶液、200 mg/L乙烯利溶液均能保障干旱状态下,甘蔗一代种茎的有效生长。

The changes of agronomic traits of sugarcane first generation stems treated with coating and drought-resistant agent were measured after natural drought and rehydration,and the physiological mechanism changes of sugarcane first generation stems induced by coating and drought-resistant agent treatment were clarified,providing reference for drought-resistant planting of sugarcane first generation stems.There were 9 treatments in 3 groups,which were control group:normal water supply group A(CKA),normal drought and rewater(CKB);coating group:chitosan coating film(SC1),PE plastic film(SC2),breathable PET material coating(SC3);drought resistance agent group:ammonium polyacrylate(D1),sodium polyacrylate(D2),Xanthan gum(D3),Guar gum(D4),3.9648 mg/L(molecular weight 264.32,15μmol/L)ABA(D5),2000 mg/L CaCl2 solution(D6),200 mg/L ethephon solution(D7).The results showed that after short-term drought,for example,after 10 days of drought,drought resistance agent group D1,D2,D4,D5,D6 and D7 treatment and coating group SC1 and SC2 treatment could ensure the effective growth of sugarcane first generation stem.Long-term drought,such as 20 days after drought,drought resistance agent group D1,D6 and D7 treatment can still ensure the effective growth of sugarcane first generation stem.After 10 days of rehydration,drought resistance agent groups D1,D5,D6 and D7 could still ensure the effective growth of sugarcane first generation stem.It was concluded that ammonium polyacrylate,2000 mg/L CaCl_(2) solution,200 mg/L ethephon solution could guarantee the effective growth of sugarcane first generation stem under drought condition.