摘要
以＂冈优22＂、＂Ⅱ优162＂和＂K优047＂为材料,通过裂区试验设置不同种植方式研究了水稻秧苗移栽后根系与地上部增重模型及其相互关系。结果表明：秧苗移栽至拔节期,根系增重和地上部干物质积累均呈指数模型增加,根系模型的相关指数在0.98以上,地上部模型的相关指数在0.94以上。地上部干重与根重间存在极显著的线性相关关系。根冠比在移栽后开始上升,至栽后10~15 d时达到最大值,然后下降,呈单峰曲线。3种种植方式中,免耕高留茬抛秧地上部和根系干重均最低,移栽后前期生长最慢,但根冠比要高于常耕插秧处理。3个品种中,＂冈优22＂根系和地上部干物质积累量最高,＂Ⅱ优162＂的根冠比最大。
The exponential model and correlation between root weight and shoot increment of rice,c.v.Gangyou22,Ⅱyou162 and Kyou047 in different tillage and transplanting methods,were investigated in a field experiment of spit design.The dry weight（DW） accumulation of root and shoot were suitable for exponential model well from transplanting to elongating stage.The coefficient determination（R2） of the model of shoot increment was over 0.94,and of root was more than 0.98.There was highly significant positive correlation between DW of shoot and roots.The root/shoot ratio was single peak curve from transplanting to elongating.The root/shoot ratio increased in early stage,and reached peak at 10-15 d after transplanting.The DW of shoot and roots of the broadcasted high standing-stubbles under no-tillage condition treatment was the lowest among all treatments,but its root/shoot ratio was higher than that of the conventional tillage transplanting rice.DW of top and roots of Gangyou22 was the highest,while root/shoot ratio of Ⅱyou162 was the highest among three cultivars.
出处
《四川农业大学学报》
CSCD
北大核心
2010年第4期421-425,共5页
Journal of Sichuan Agricultural University
基金
国家粮食丰产科技工程项目(2006BAD02A05)
四川农业大学青年基金项目
关键词
水稻
根系
指数模型
根冠比
rice（Oryza sativa L.）
root system
exponential model
root/shoot ratio
