CAJ | 학술논문

在大田条件下，研究了低氮磷水平下施钾处理(常规施钾(225.0 kg/hm2)、减钾28%(175.5 kg/ hm2)和不施钾(0 kg/hm2))对水稻粤晶丝苗2号、桂香占、华优8305和天优998的产量形成、品质及钾吸收利用的影响。结果表明，与常规施钾相比，减钾28%提高华优8305的结实率及天优998的有效穗和结实率，进而增产；桂香占的有效穗、结实率和千粒质量提高，但每穗总粒数下降，因而稳产；粤晶丝苗2号有明显的减穗减粒效应。减钾28%有利改善华优8305的稻米品质；不利改善另外3个水稻品种稻米碾磨品质。适度减钾对水稻剑叶和籽粒生理代谢酶活性无显著负面影响，减钾28%有利提高钾素利用率。低氮磷水平下减钾对华南早晚兼用型水稻产量和品质的影响因品种而异。
재대전조건하，연구료저담린수평하시갑처리(상규시갑(225.0 kg/hm2)、감갑28%(175.5 kg/ hm2)화불시갑(0 kg/hm2))대수도월정사묘2호、계향점、화우8305화천우998적산량형성、품질급갑흡수이용적영향。결과표명，여상규시갑상비，감갑28%제고화우8305적결실솔급천우998적유효수화결실솔，진이증산；계향점적유효수、결실솔화천립질량제고，단매수총립수하강，인이은산；월정사묘2호유명현적감수감립효응。감갑28%유리개선화우8305적도미품질；불리개선령외3개수도품충도미년마품질。괄도감갑대수도검협화자립생리대사매활성무현저부면영향，감갑28%유리제고갑소이용솔。저담린수평하감갑대화남조만겸용형수도산량화품질적영향인품충이이。
Effects of K fertilizer (Conventional N (225. 0 kg/ha),reduction of K by 28% (175. 5 kg/ha) and without K(0 kg/ha) ) on rice yield formation,rice quality and K uptake and utilization were studied using four vari-eties (Yuejingsimiao 2,Guixiangzhan,Huayou 8305 and Tianyou 998) in field experiment. Results showed that, compared with conventional K,reduction of K by 28% improved seed setting rate in Huayou 8305,increased both effective panicle numbers and seed setting rate in Tianyou 998 , which result in increase in yield;Guixiangzhan showed stable in yield due to increase in effective panicle numbers,seed setting rate and 1000-grain weight,but de-crease in grains number per panicle. For Yuejingsimiao 2, significant decrease in effective panicle numbers and grains number per panicle was found. Reduction of K by 28% improved rice quality in Huayou 8305,but showed unfavorable effect on milling quality in other experimental varieties. Moderate reduction of K showed no significant negative effects on physiological metabolism enzyme activity in flag leaf and grain,reduction of K by 28% was favor-able to improve K utilization. Reduction K application had different effects on the yield and quality of different vari-eties used in both early and late season.