摘要
为给水旱轮作制下小麦缺锰问题的解决提供依据,采用田间和盆栽试验研究了蚕豆/小麦间作对小麦锰吸收的影响。结果表明,在拔节期,蚕豆/小麦间作显著提高了小麦根际土壤中交换性锰的含量,其中,田间试验间作第1行、第3行小麦比单作分别增加了21.09%、7.78%,盆栽试验间作比单作增加了37.63%,但小麦锰的吸收却没有表现出间作优势。抽穗后,田间试验蚕豆/小麦间作显著促进了小麦对锰的吸收,其中,间作第1行、第3行小麦地上部锰的累积量比单作在抽穗期分别增加了39.30%、29.06%,灌浆期分别增加了51.50%、65.30%,成熟期分别增加了36.17%、13.86%;盆栽试验间作小麦地上部锰的累积量在分蘖期、拔节期、灌浆期和成熟期分别增加了107.46%、36.07%、26.67%、20.92%,但间作小麦根际土壤中交换性锰的含量处于劣势。总之,通过蚕豆/小麦间作在抽穗前提高了小麦根际土壤中交换性锰的含量,从而促进了在灌浆过程小麦地上部,尤其是叶和穗对锰的吸收。
The field and pot experiments were carried out to explore the effects of intercropping wheat with faba bean on manganese uptake of wheat grown under paddy-upland rotation system.The results showed that the exchangeable manganese（NH4OAC-Mn） in the soil rhizosphere of intercropped wheat was significantly higher than that of monocropping.The NH4OAC-Mn content of row one（IW1） and row three（IW3） of intercropping wheat increased by 21.09% and 7.78% in the field experiment,and increased by 37.63% in the pot experiment,respectively.However,the manganese Absorption of wheat intercropping showed no advantage at stem elongation stage before heading.After heading,faba bean intercropped with wheat promoted the Absorption of manganese in wheat.The manganese accumulation in wheat above-ground of IW1 and IW3 increased by 39.30% and 29.06% at heading stage,51.50% and 65.30% at milk stage,36.17% and 13.86% at ripening stage in the field experiment,respectively.In the pot experiment,the manganese accumulation in wheat above-ground of intercropping wheat increased by 107.46% at tiller stage,36.07% at stem elongation stage,26.67% at milk stage and 20.92% at ripening stage,respectively.But the NH4OAC-Mn content in rhizosphere soil of intercropping showed no accumulation.In conclusion,intercropping faba bean with wheat could increase manganese available in the rhizosphere soil before heading and its uptake by wheat above-ground（especially leaves and spike） during milk,which improved the nutrient imbalance in wheat with respect to manganese under an upland-paddy rotation system.
出处
《麦类作物学报》
CAS
CSCD
北大核心
2010年第2期372-377,共6页
Journal of Triticeae Crops
基金
国家自然科学基金项目(30860157)
国家“973”计划前期研究专项(2008CB117011)
公益性行业专项(200803030)
国家科技支撑计划项目(2006BAD05B06-04)
关键词
小麦
蚕豆/小麦间作
水旱轮作
锰吸收
Intercropping faba bean and wheat
Upland-paddy rotation
Wheat
Manganese uptake
