摘要
从块根膨大速率、干物质积累、干物质分配、块根ABA含量变化4个方面,对秦薯4号干物质积累及分配规律进行了系统研究。结果表明,秦薯4号块根膨大有两个高峰期,第一高峰期出现在栽苗后80～100d,栽苗后120～140d出现第二次膨大高峰期;在全生长过程中,秦薯4号的生长势弱于徐薯18。秦薯4号的生物学干物质积累量普遍低于徐薯18。而经济产量普遍高于徐薯18;从干物质分配情况来看,秦薯4号在栽种60d以后T/R值小于1,呈递减趋势,而且秦薯4号的T/R值普遍小于徐薯18,说明秦薯4号干物质分配更加合理,更容易形成较高的经济产量;秦薯4号块根ABA含量在栽后40～70d增加较快,90～110d含量最低,110～140d含量又迅速增加,这与秦薯4号块根膨大速率变化趋势相似。
The characteristics of the accumulation of dry matter,the distribution of dry matter of Qinshu 4 were studied from 4 aspects, the thickening rate of storage root, the accumulation of dry matter,the distribution of dry matter and that of storage root ABA content.The results showed,storage root thickening of Qinshu 4 had two peaks,the first appeared in 80~100 days after planting,the second appeared in 120~140 days after planting.During whole growth course,the growth vigor of Qinshu 4 was weaker than Xushu18.The biologic yield was lower than Xushu18,the economic yield was higher than Xushu18 generally.From the distribution of dry matter,T/R ratio of Qinshu 4 in 60 days after planting was less than 1,showed decreasing tendency.T/R ratio of Qinshu 4 was less than that of Xushu18,showed that the distribution of the dry matter of Qinshu 4 was more reasonable,therefore Qinshu 4 produced higher economic yield than Xushu18.ABA content of storage root of Qinshu 4 increasd rapidly in 40~70 days after planting,the content was minimum in 90~110 days ,in 110~140 days ABA content increased promptly again,it was similar as the change tendency of storage root thickening rate of Qinshu 4.
出处
《西北农业学报》
CAS
CSCD
2004年第4期108-111,119,共5页
Acta Agriculturae Boreali-occidentalis Sinica
基金
陕西省攻关项目(2002K02-G4-4)
