摘要
冬前至孕穗期不同生育期追施肥水,对根系的影响不同。追施肥水可提高根系活性,早施,根系活性最大值出现得早,后期根系活性降低得也快。开花、灌浆期的根系活性均以拔节、孕穗肥水为高。根系活性对叶片衰老速度有明显的影响,与地上部干重、产量及产量性状存在着密切的关系。
The experiment was carried out from 1982 through 1986 to investigate the effectof top-dressing and irrigation time on the characteristics of the root system andaboveground parts of winter wheat. The results indicated that different top- dressingand irrigation time had different effect. The application of fertilizers could promoteroot vigor. The earlier the application, the sooner the occurrence of the maximum val-ue of vigor; but the root vigor would decline more rapidly in the later growth stages.Top- dressing at the jointing stage and the booting stage could lead to higher root vig-or during the flowering and grain-filling stages than other treatments. Root vigorcould influence the senescence of leaves significactly. It was also closely related to dryweight of above- ground parts, yield and yield components.
出处
《作物学报》
CAS
CSCD
北大核心
1993年第2期149-156,共8页
Acta Agronomica Sinica
关键词
冬小麦
施肥
根系
根系活性
Winter wheat
Top- dressing and irrigation time
Root system
Root vigor
