二棱大麦分蘖与成穗规律的研究

STUDIES ON LAW OF TlLLERING AND FORMING SPIKE OF DUAL RIDGE BARLEY

1986～1988年,对宁夏引黄灌区二棱大麦主要栽培品种进行了研究,摸索出了早、中、晚三种熟期类型代表品种的分蘖变化动态及成穗规律。试验表明,引黄灌区目前种植的二棱大麦各品种在当地的生态条件下,均具有分蘖力强、成穗率高并受栽培条件影响较大、穗粒数少和易倒伏的特点。最后指出,二棱大麦欲获高产,每亩必须保证有一定的收获穗数;生产上可选用分蘖力强、成穗率高的品种,主、蘖并重,适当稀植,通过促蘖增穗途径达到高产。

In 1986-1988, the main cultivars of dual ridge barley h-ave been stueied in Yellow river irrigation area of Ningxia.The laws of change trands and forming spike of cultivars (different types, ear-ly, middle and late ripe) have bccn elaborated.The fesult shows: the different cultivar of dual ridge barley qlanting in rellow River irrigati-on area of Ningxia possess the strong tillering characteristics, high fate of forming sqike and it was effected by cultivating condition, less num-ber of grains per spike, lodging frequently in the ecological condition of Ningxia. Finally, it was also qut forward there must be certain nu-mber of spike per mu in order to high yield. The cultivars of strong ti-ller abili.ty and high rate of forming ear are selected, adopting the way not only pay attention to main stem but also tiller, appropriate rare pl-anting, to qromote tillering, to increase the number of ear in ouder to achieve high yield.