摘要
通过田间试验研究了施锰时期对不同小麦基因型缺锰状况、产量及吸锰量的影响。结果表明 ,在水旱轮作缺锰土壤上 ,施用锰肥可以显著改善小麦缺锰症状提高小麦籽粒产量和吸锰量 ,其效果以全生育期施锰处理优于单个生育期施锰 (分蘖期、拔节期和孕穗期 ) ;不同基因型小麦比较 ,无论缺锰症状或小麦产量对锰肥的反应 ,均以 80 8最耐缺锰 ,85 4 1次之 ,绵阳 2 6和32 95对缺锰最为敏感。上述结果说明 ,在严重缺锰土壤上只有各个生育期均满足小麦锰营养的需要小麦产量水平才能达到最佳 ,不仅应在小麦生长前期保证锰的供应而且还应注意营养生长后期的锰素供应 ,这对于缺锰敏感的小麦基因型尤其如此。
A field experiment was conducted to study the effect of Mn application periods on Mn deficient symptoms, grain yield and Mn uptake of different wheat genotypes. The results showed that the application of Mn fertilizer could alleviate Mn deficient symptoms of wheat and increase grain yield and Mn uptake of wheat in Mn deficient soil with rice-wheat rotation. However, the yield and Mn nutrition effects of Mn fertilizer ranked by the sequence of Mn1(applying Mn fertilizer at sowing, tillering, shooting and ear emergence stages)>Mn4 (applying Mn fertilizer at ear emergence stage)≥Mn2 and Mn3(applying Mn fertilizer at tillering and shooting stage)>CK. According to the response of Mn deficient symptom and grain yield to Mn fertilizer, the tolerant potential to Mn deficiency of four wheat genotypes in the field trial could arrange in the order of 80-8>8541>3295 and Mianyang 26. The result that the highest grain yield of wheat was obtained in Mn1, suggested the Mn application period should not only consider tillering stage but also the late nutritional growing stage(such as ear emergence stage)especially when the sensitive wheat genotypes were used in serious Mn deficient soils.
出处
《西南农业学报》
CSCD
2001年第4期39-43,共5页
Southwest China Journal of Agricultural Sciences
基金
国家自然科学基金资助 ( 4 980 10 13)
