摘要
以同期播种的常规栽培水稻为对照,研究稻渔共作对水稻生长发育动态、株型特征及产量形成的影响。结果表明,稻渔共作具有改善稻田土壤的理化性状,延长水稻生育期,增加群体各生育期生物量,提高叶面积指数和冠层叶片的面积,延缓后期功能叶片衰老,增大茎秆粗度,促进根系发育及伸长节上须根发生等特点。但同时也表现出稻株基部节间长度增大,节间数增多,植株重心上移,后期根系活力降低等特征。在产量及其结构方面表现为茎蘖成穗率、穗粒数和结实率下降,粒重增加,若品种选择与栽培控制得当,可提高单位面积有效穗数并达到增产的目的。
By using single rice cultivation as a control,the effect of rice-fish culture on growth dynamic,plant type and yield formation of rice was studied. The results showed as follows:rice-fish culture improved the physic-chemical properties of arable layer soil of paddy field, extended growth period of rice,increased dry matter and LAI of different growth stages,improved 3 top leaves area,deterred the degeneration of leaves function,increased the diameter of stem,promoted the growth of roots and the formation of roots in the extended stem. In the same time,rice-fish culture extended the length of basal internodes,increased the number of internodes,uplifted the gravity of plant,depressed the roots vigor. For the grain yield and yield structure of rice,rice-fish culture decreased ear/tillering ratio,spikelet/panicles and seed set percentage,increased grain weight. If variety choice and cultivation technology were controlled rightly,rice-fish culture could increase the effective panicles and improve grain yield of rice.
出处
《中国农业科学》
CAS
CSCD
北大核心
2004年第10期1451-1457,共7页
Scientia Agricultura Sinica
基金
国家"十五"科技攻关–生态农业技术体系研究与示范资助项目(2002BA516A14)
江苏省"十五"科技攻关资助项目(BE2001330)
