干旱区生态环境知识资源中心(Arid): 旱农区春小麦根系生长冗余与碳平衡关系的研究

Arid

	旱农区春小麦根系生长冗余与碳平衡关系的研究
其他题名	Study on the relationsip between spring wheat root growth redundancy and carbon balance in semi-arid area
	许宝泉 1; 张荣 1; 张大勇 2; 孙国钧 1
来源期刊	西北植物学报
ISSN	1000-4025
出版年	2003
卷号	23 期号:6 页码:958-963
中文摘要	利用McCree(1986)测定整株植物碳平衡的方法，研究了半天旱区3个春小麦品种的籽实产量、根量、根冠比与碳平衡的关系。结果表明在开花期地方品种和尚头较之现代品种有更大的根量和根冠比。同一品种不同水分条件下根和茎叶CO_2交换率（CER）波动幅度与水分条件正相关；在相同水分条件下不同品种间，品种和尚头波动幅度最大，品种定西－24次之，品种陇春－8139最小。从根和茎叶呼吸及日净碳获得量随水分供给条件的变化来看，品种和尚头和品种定西－24与品种陇春－8139相比在资源获取器官上存在着生长冗余，而且这种冗余也表现在生理代谢上，随水分条件的改善而增加。说明大根系品种在根系上存在着冗余，减少根系冗余可望成为半干旱区小麦高产育种的一条有效途径。
英文摘要	McCree’s method (1986) was used to study the relationship of among spring wheat land race "Heshangtou",modern variety "Dingxi-24" and modern variety "Longchun-8139" root growth redundancy and carbon balance in semi-arid area of Loess Plateau in 1997 and 1998. It is shown that the modern variety Dingxi-24 and 8139 is more productive than the landrace "Heshangtou" when planted in monoculture, but when sowed in mixture Dingxi-24 and 8139 will be eliminated in a few generations. There is a kind of nega-tive correlation between competitive ability and productive performance in crop varieties. The reason is that the land race allocate more resources to the vegetive organs than the modern variety of spring wheat, there-by conferring a higher competitive ability on it. The relationships among seed yield, root size, root/shoot ra-tios and carbon balance of spring wheat varieties were studied in growth room. The results showed that the old landrace "Heshangtou" has more root biomass, root /shoot ratios and higher root respiration than mod-ern varieties "Dingxi-24" and "Longchun-8139" at florescence stage. There was significant difference in seed yield due to different soil water content and varieties (P > 0.05). But there was not significant differ-ence in seed yield due to different clipping root treatments (P > 0.05). There were negative correlation be-tween root weight and yield, root weight and above-ground biomass, root respiration and yield, root respiration and above-ground biomass. There maybe a root redundance, such as in landrace with a lower yield un-der the conditions of favourable rainfall. To reduce the root biomass to a suitable size may be a hopeful way for improving the yield of spring wheat varieties in semi-arid area
中文关键词	春小麦 ; 根系 ; 生长冗余 ; 产量潜力 ; 碳平衡
英文关键词	springh wheat root system growth redundance yield potential carbon balance
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:1252471
来源机构	兰州大学 ; 北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204475
作者单位	1.兰州大学, 兰州, 甘肃 730000, 中国; 2.北京师范大学生态研究所, 北京 100875, 中国
推荐引用方式 GB/T 7714	许宝泉,张荣,张大勇,等. 旱农区春小麦根系生长冗余与碳平衡关系的研究[J]. 兰州大学, 北京师范大学,2003,23(6):958-963.
APA	许宝泉,张荣,张大勇,&孙国钧.(2003).旱农区春小麦根系生长冗余与碳平衡关系的研究.西北植物学报,23(6),958-963.
MLA	许宝泉,et al."旱农区春小麦根系生长冗余与碳平衡关系的研究".西北植物学报 23.6(2003):958-963.