摘要
为了揭示木薯品种桂热4号(GR4)块根膨大期一次性施入外源激素对农艺性状和产量指标的影响,试验设置了以外源激素(多效唑、赤霉素、矮壮素和2,4-D)为主处理,施用方式(浇施、喷施)为副处理的裂区试验,对比分析了各处理木薯生长和产量状况。结果表明:施用多效唑、矮壮素和2,4-D同时限制了地上茎叶生物量和地下薯块产量增加,叶面喷施赤霉素可明显增加茎叶生物量和薯块产量,外源激素能在一定程度上调节同化物的合成分配,但增产的根本首先在于增加整株的光合同化产物总量。GR4块根膨大期一次性喷施赤霉素操作成本低,增产明显,可以作为一项增产增收的技术运用。
In order to reveal the effect of one-off application of exogenous hormones on agronomic characteristics and yield indices of cassava GR4 in the root expansion period,a split area experiment was set up,in which the exogenous hormones(PP333,GA,CCC and 2,4-D)were the main treatments and the application methods(watering and spraying)were the secondary treatments.The results showed that the treatment of PP333,CCC and 2,4-D restricted the increases of biomass in leaves and stems and tuber root yield.Spraying GA on the leaf promoted the increases of biomass and tuber yield significantly.This study shows that exogenous hormones can regulate the synthesis and distribution of photoassimilates,but the essence of increasing production is to increase the total assimilation products.Spraying GA once in the period of tuber root expansion is low cost,which can be used as a technique to increase production and income.
作者
段元杰
杨玉皎
孟富宣
刘海刚
黄洁
魏云霞
DUAN Yuan-jie;YANG Yu-jiao;MENG Fu-xuan;LIU Hai-gang;HUANG Jie;WEI Yun-xia(Tropical Eco-Agricultural Research Institute,Yunnan Academy of Agricultural Sciences/Yuanmou Dry-Hot Valley Botanical Garden,Yuanmou,651300,PRC;Institute of Tropical Crop Genetic Resources,Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Conservation and Utilization of Cassava Genetic Resources,Ministry of Agriculture,Danzhou 571737,PRC)
出处
《湖南农业科学》
2020年第2期15-18,共4页
Hunan Agricultural Sciences
基金
国家现代木薯产业技术体系建设专项资金(CARS-11-hnhj)。
关键词
木薯
外源激素
GR4
农艺性状
产量
cassava(Manihot esculenta Crantz)
exogenous hormones
GR4
agronomic characteristics
yield
