冀北高原春小麦“密、控、促”增产技术研究

STUDY ON THE TECHNIQUE OF YIELD-INCREASING FOR COMPACT PLANTING, TILLER-CONTROLLING AND GRAIN WEIGHT RAISING ON SPRING WHEAL IN THE NORTH PLATEAU OF HEBEI PROVINCE

1991—1994年,对高寒半干旱区春小麦发育生物学、耗水特性、肥料与水分效应等进行了系列研究。结果表明,高寒半干旱区春小麦穗粒发育具有“三长”优势,生育耗水与自然降水供应表现时间交错,拔节—孕穗期为补水关键期。在此基础上研究提出了早播密植主茎成穗,控蘖促根,拔节后肥水相促,促粒多粒重的春小麦“密、控、促”增产技术。

The developing biology, charcters of water-consuming, effects of fertilizer and water etc of spring wheat in the cold and semiarid region were studied from 1991—1994 in this paper. The results indicated that the spring wheat in this region had an advantage over in spike differentiation and grain filling, and the relation between water consuming and natural rainfall in growing stage of spring wheat was contradictious, the key stage of water irrigating was in joint stage-booting stage. On the basis of these researches, the technique of yield increasing for early sowing and compact planting, ears of mother stem, tiller controlling and root promoting, raising the grain and weight of per ear on spring wheat were produced.