水稻秧田单、双株寄栽留苗的应用研究

通过对水稻秧田单、双株寄栽留苗的研究，结果表明：双株寄栽留苗的单株叶面积和叶面积指数无论在分蘖初期还是分蘖盛期均高于其它处理，其叶面积指数分别为2．69，7．22。单株寄栽的每株分蘖成穗数极显著高于双株寄栽。留苗处理的每穗颖花数和结实率分别显著、极显著高于其移栽处理。留苗处理的经济产量极显著高于移栽处理，其F值为17．25**，而单、双株寄栽间的经济产量无显著差异因此，秧田留苗宜在稻区大力推广。

STUDIES ON EFFECT OF SINGLE AND DOUBLE PLANT DEPOSITTRANSPLANTING AND REMAINING-SEEDLING ON RICE SEEDLING BED

Effect of single anl double plant deposit-transplanting and re-main ingg-seedling in rice seedling bed were studied in this experiment. The results showed that leaf area and leaf area index of single plant in treatment of double plant deposit-transplanting and remaining-seedling were higher than those in other treatments in both tillering primary and flourish periods, the leaf area indexes were 2.69 and 7 .22 respectiyely in the twoperiods. The amounts of tilltering-becoming ear of single plant in treatment of single plant deposit-transplanting were significant higher than that in treatment of double plant deposit-transplanting at P<0.01 level. Spikelet amounts per ear, bearing percentage and economic yields (F=17.25(**) ) in remaining-seedling treatment were significant higher than those in transplanting treatment at P<0.05, P<0.01 and P<0.0l level respectively.There were not signifi cant differences between single plant and double deposit-transplanting treatments. It is suggested that the technology of remaining-seed ling on rice seedling bed be spreaded greetly in paddycultivating regions.