摘要
以冬小麦小偃22为试验材料,在120 kg/hm^2施氮水平和基本苗为130-150万hm^2下,研究常规栽培（CK）、覆草栽培、地膜覆盖3种不同栽培模式灌浆期小麦籽粒可溶性总糖含量、蔗糖含量及淀粉累积的动态变化。试验结果表明,不同栽培模式小麦籽粒可溶性总糖含量、蔗糖含量、淀粉含量存在差异。与常规栽培相比较,在覆草栽培条件下,可溶性总糖含量、蔗糖含量在灌浆前期高于常规栽培,在成熟期低于常规栽培;而淀粉含量始终高于常规栽培,且籽粒的饱满指数和产量均显著高于常规栽培。地膜覆盖栽培条件下,可溶性总糖含量、蔗糖含量在灌浆前期高于常规栽培,在成熟期低于常规栽培;而淀粉含量始终高于常规栽培,且籽粒的饱满指数和产量均高于常规栽培。在覆草和地膜覆盖栽培条件下冬小麦器官中可溶性总糖、蔗糖的合成代谢旺盛,可溶性总糖含量、蔗糖积累量高,“库”器官中可溶性总糖、蔗糖供应充足,可溶性总糖、蔗糖的降解代谢旺盛,具有较强的同化物利用能力,为籽粒中淀粉的快速积累以及最终实现较高的粒重和产量奠定了基础。
The experiment was carried out to study the effects of three farming modes （Flat planting, straw mulching, plastic film-mulching） at 120 kg N/hm^2 and planting density 130- 150 × 10^4 plants/hm^2 on sugar contents and starch accumulation in grains during grain filling of the winter wheat variety Xiaoyan 22. The results showed that sugar contents and starch accumulation varied with the farming modes. Compared with flat farming, the total soluble sugar contents and sucrose contents in straw mulching and plastic film-mulching were higher than that in flat farming during the early filling stage, while they were lower than that in flat farming during maturity stage. The starch contents in straw mulching and plastic film-mulching were higher than that in flat farming during the filling stage, and satiety index of wheat grain and the yield were all higher than that in flat farming. The results indicated that anabolism of total soluble sugar and sucrose of wheat in straw mulching and plastic film-mulching were thriving, and the total soluble sugar and sucrose were abundance in grains in straw mulching and plastic film-mulching. The degradation of total soluble sugar and sucrose of wheat in straw mulching and plastic film-mulching were thriving, and the ability of supplying and utilizing assimilate in straw mulching and plastic film-mulching were strong during grain filling stage.
出处
《干旱地区农业研究》
CSCD
北大核心
2008年第2期90-93,101,共5页
Agricultural Research in the Arid Areas
基金
国家高技术研究发展计划(863计划)项目(2006AA100201)
国家自然科学基金重大项目(30230230)
关键词
栽培模式
冬小麦
可溶性总糖
蔗糖
淀粉
farming modes
winter wheat
total soluble sugar
sucrose
starch
