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以垦鉴稻5号和垦稻12为材料,采用负压式土壤湿度计监测土壤水势,通过防雨棚内的盆栽控水试验,研究了水稻返青至成熟期进行-8～-10kPa的间歇控水对寒地水稻穗部性状及产量的影响。控水处理增加了垦稻12号的穗长;增加了两品种的单穗重;增加了两品种上、中部一次枝梗数和上、中部二次枝梗数,降低了两品种下部二次枝梗数。减少了两品种收获的每穴穗数,且垦稻12号的穗数降低达到极显著水平;增加了两品种的穗粒数、结实率;增加了垦鉴稻5号的千粒重,降低了垦稻12号的千粒重;增加了垦鉴稻5号的经济产量,降低了垦稻12号的经济产量。
Taking Kenjiandai5 and Kenyao12 as materials, the soil water potential was monitored by negative pressure soil hygrometer. The water control experiment in pots under canopy was used to study the intermittency of -8 ~ -10kPa Effect of Water Control on Panicle Characters and Yield of Rice in Cold Region. Controlled water treatment increased the spike length of Ken rice 12; increased the single spike weight of two cultivars; increased the number of primary branches and the number of secondary branches in upper and middle of two cultivars, and decreased the number of secondary branches in lower part of two cultivars . Reducing the number of ears per hole harvested by the two cultivars, and reducing the panicle number of Kenyon 12 to the extremely significant level; increasing the number of grains per spike and the seed setting rate of two cultivars; increasing the 1000-grain weight of Kenjian 5, The 1000-grain weight of rice 12 increased the economic yield of Ken-rice 5 and reduced the economic output of Ken-rice 12.