摘要
为探索胶园间作珠芽魔芋的合理施氮方法,对有机肥氮部分替代化肥氮对珠芽魔芋生理特性、产量、品质及养分积累利用的影响进行了研究.研究设 6 个处理,分别为不施氮对照(T1)、当地习惯化肥氮用量(N 450 kg/hm2)(T2)、80%习惯化肥氮用量+20%有机肥氮用量(T3)、80%习惯化肥氮用量(T4)、60%习惯化肥氮用量+20%有机肥氮用量(T5)、30%习惯化肥氮用量+50%有机肥氮用量(T6).成熟期测定珠芽魔芋叶片形态指标、叶面球茎数量及倒伏株数、地下球茎产量、可溶性糖、淀粉、葡甘聚糖含量、氮磷钾含量及氮肥利用率.结果表明:与纯施化肥氮相比,有机肥代替部分化肥珠芽魔芋株高、茎粗、叶面球茎数量、繁殖系数增加,抗倒伏能力增强,提高了地下球茎氮肥利用率、产量、单株鲜重、膨大系数及氮、磷、钾吸收量.胶园间作珠芽魔芋的合理施氮模式为 80%化肥氮+20%有机肥氮或者 30%化肥氮+50%有机肥氮.
Abstract
In order to explore the rational nitrogen application method for intercropped Amorphophallus bulbifer in rubber plantation,the effects of organic fertilizer nitrogen partial replacement of chemical fertilizer nitrogen on physiological characteristics,yield,quality and nutrient accumulation and utilization of intercropped A.bulbifer in rubber plantation were studied.Six treatments were set up,including T1:control without nitrogen,T2:local normal chemical fertilizer nitrogen(N 450 kg/hm2),T3:80%normal chemical fertilizer nitrogen+20%organic fertilizer nitrogen,T4:80%normal chemical fertilizer nitrogen,T5:60%normal chemical fertilizer nitrogen+20%organic fertilizer nitrogen,T6:30%normal chemical fertilizer nitrogen+50%organic fertilizer nitrogen.The leaf morphological indexes,the number of bulbils of the leaves and plant lodging rate,yield and quality of underground corms,soluble sugar,starch,glucomannan content and nitrogen,phosphorus and potassium content and nitrogen use efficiency were determined at maturity stage.The results showed that the plant height,stem diameter,the number of bulbils of the leaves and propagation coefficient of A.bulbifer increased,the lodging resistance was enhanced,and the yield,fresh weight per plant,expansion coefficient and nitrogen,phosphorus and potassium absorption and nitrogen use efficiency were increased in organic fertilizer replacing partial chemical fertilizer nitrogen treatment,compared with pure chemical fertilizer nitrogen application treatment.The optimal nitrogen application mode for the intercropped A.bulbifer was 80%chemical fertilizer nitrogen+20%organic fertilizer nitrogen or 30%chemical fertilizer nitrogen+50%organic fertilizer nitrogen.
基金项目
中国热带农业科学院基本科研业务费专项(1630022020025)
中央级公益性科研院所基本科研业务费专项(1630022022002)
现代农业产业技术体系建设专项(CARS-33-YZ4)
NETL
NSTL
万方数据