CAJ | 학술논문

为探索氮肥运筹对免耕条件下水稻根系生长以及对根际土壤特性、产量的影响，以金优253为材料进行试验。结果表明：平衡施肥显著提高单株根系干重、根长、单株生物量、根半径、单株根表面积、根长密度及根系活力，实收单产高于重穗肥和重基肥处理，且与重基肥差异达95％的显著水平，主要是有效穗数、结实率的增加。平衡施肥显著提高0~10 cm土层的0~2 mm根际土壤有机质、碱解氮含量及脲酶、蔗糖酶活性。因此平衡施肥能明显促进免耕水稻根系生长和有效穗数的增加，对提高水稻产量具有促进作用。
위탐색담비운주대면경조건하수도근계생장이급대근제토양특성、산량적영향，이금우253위재료진행시험。결과표명：평형시비현저제고단주근계간중、근장、단주생물량、근반경、단주근표면적、근장밀도급근계활력，실수단산고우중수비화중기비처리，차여중기비차이체95％적현저수평，주요시유효수수、결실솔적증가。평형시비현저제고0~10 cm토층적0~2 mm근제토양유궤질、감해담함량급뇨매、자당매활성。인차평형시비능명현촉진면경수도근계생장화유효수수적증가，대제고수도산량구유촉진작용。
The effect of nitrogen application modes on root growth,rhizosphere soil characteristics and rice yield under no-tillage and cast transplanting rice was studied.The results showed that balanced fertilization made obvious influ-ence on no-tillage and cast transplanting rice root growth,and physiology.The rice shoot dry weight and biomass per plant,root number,root density,root activity of balanced fertilization were higher than other treatments,the differ-ences were significant in rice later growth.However,there were no significant differences in root length.Balanced fer-tilization increased spike lets per panicle and seed set.Balanced fertilization significantly increased 0-10 cm soil layers organic,available nitrogen and urease activity of 0-2 mm rhizosphere soil in rice late growth.Therefore,it can been concluded that balanced fertilization acquired higher grain yield by improving rhizosphere soil,promoting root growth and increasing effective panicles.