CAJ | 학술논문

通过设置氮、钾肥施用量试验，研究了氮钾肥在水稻中的积累规律及其合理施用。结果表明：（1）水稻对氮、钾养分的吸收积累动态呈Logistic曲线，氮素以本田前期吸收最多，中期次之，后期很少；钾素以在本田中期吸收最多，前期次之，后期也很少；（2）水稻对氮、钾养分的积累量（y）随施肥量（x）的平方根值（ x ）的增加而增加，但当季利用率降低；（3）稻谷产量与氮、钾肥施用量呈抛物线型相关；（4）水稻对氮素更敏感，而较耐低钾和高钾，在本试验条件下，经济施氮量为150 kg／hm2，经济施钾量为130 kg／hm2，相当于每生产100 kg稻谷施氮1．44 kg、施钾1．25 kg。
통과설치담、갑비시용량시험，연구료담갑비재수도중적적루규률급기합리시용。결과표명：（1）수도대담、갑양분적흡수적루동태정Logistic곡선，담소이본전전기흡수최다，중기차지，후기흔소；갑소이재본전중기흡수최다，전기차지，후기야흔소；（2）수도대담、갑양분적적루량（y）수시비량（x）적평방근치（ x ）적증가이증가，단당계이용솔강저；（3）도곡산량여담、갑비시용량정포물선형상관；（4）수도대담소경민감，이교내저갑화고갑，재본시험조건하，경제시담량위150 kg／hm2，경제시갑량위130 kg／hm2，상당우매생산100 kg도곡시담1．44 kg、시갑1．25 kg。
Through setting field fertilization test , the author studied the accumulation rule of nitrogen ( N) and potassium ( K) fertilizer in rice plants and their reasonable application rates in rice production .The results showed that the dynamics of both N and K nutrient accumulation in rice plants exhibited a Logistic curve .N accumulation amount in rice plants was the most at earlier stage ( from transplanting to bud differentiation ) , the second most at middle stage ( from bud differentiation to full heading ) , and the least at later stage (from full heading to maturing).However, K accumulation amount in rice plants was the most at middle stage , the second most at earlier stage , and the least at later stage .N and K accumulation amount ( y) in rice plants increased with the in-crease in the square root of N and K application rate ( x) , but their utilization rate in the tested season reduced .The rice grain yield had a parabolic relationship with the application rate of N and K fertilizer .Rice plants were more sensitive to N , and were more tol-erant to low-level K or high-level K.Under the conditions of this test , the economic application rates of N and K were 150 kg/hm2 and 130 kg/hm2, respectively, being equivalent to 1.44 kg N and 1.25 kg K application for the production of 100 kg rice grain.