信阳地区两系杂交水稻两优培特大面积高产栽培技术

High Yielding Cultiration Techniquesin Large Area of Two-Line HybirdRice Lia-You peite in Xinyang Prefecture

信阳地区1995年开始试验推广两优培特,1997年推广0.8万ha,平均理论单产9049.5kg/ha,较汕优63增产近一成左右.其主要高产栽培技术为:肥床早育,培育短龄壮秧;合理密植,增加每亩穗数;肥促水控,争取穗大粒多.

In 1997 Two-Line hybird rice Lia-You peite were popularize in 8 thousand ha of rice fields in Xinyang prefecture. The new hybird combination was reach 9049. 5kg per-hectare of rice grains, 10%more than Shun-You 63 were increased. High yielding cultiration techangues include: (1)Seeding culture under dry and fertile conditions raising and short seeding age(not over 35 days)vigorous seedings. (2)The planting spacing is about 13. 3cm×23. 3cm and 16. 5cm×20cm and 13. 3cm×26. 7cm,with the basic seedings of 1. 2-1. 5mil/ ha. (3)Fercilizer and water management 180-200kg pure nitrogen is applied on a hectare with the ratio of fertilizers basal :cillering :head sprouting6: 2. 5 : 1. 5; the standing water is drained away when the number of tillers is up to the expected number of panicles and reirri-gated when the second top leaves of 50% main cutms emerge.