CAJ | 학술논문

通过沙培盆栽试验，以完全营养液处理为对照，应用修正诊断施肥综合法（ Modified diagnosis and recommenda-tion integrated system ，M-DRIS）对缺N处理马铃薯幼苗各采样部位N、P、K的丰缺状况进行了诊断．结果表明，N缺乏抑制马铃薯植株的生长发育；缺N处理中N含量有所下降，而P、K含量增加；养分非平衡指数（ Nutrient imbal-ance index，NII）：地上茎＞叶＞块茎＞叶片＞叶柄＞地下部，地上茎中养分最不平衡，地下部较适宜；缺N处理马铃薯幼苗的需肥顺序是：N＞K＞P．
통과사배분재시험，이완전영양액처리위대조，응용수정진단시비종합법（ Modified diagnosis and recommenda-tion integrated system ，M-DRIS）대결N처리마령서유묘각채양부위N、P、K적봉결상황진행료진단．결과표명，N결핍억제마령서식주적생장발육；결N처리중N함량유소하강，이P、K함량증가；양분비평형지수（ Nutrient imbal-ance index，NII）：지상경＞협＞괴경＞협편＞협병＞지하부，지상경중양분최불평형，지하부교괄의；결N처리마령서유묘적수비순서시：N＞K＞P．
Through the sand culture pot experiment ,using complete solution as the control , modified diag-nosis and recommendation integrated system ( M-DRIS) was used to diagnose the N ,P,K sufficiency in different parts of N deficiency potato .The results showed that nitrogen deficiency would inhibit the growth of potato .The nutrient content of N was lower than CK ( complete solution ) while the nutrient content of P,K were higher .Nutrient imbalance index ( NII):aerial stem>leaf>the petiole>leaf blades>tuber>underground portion .The nutrient content of aerial stem was the most imbalanced part , while under-ground portion nutrient content was in a proper range .The order of nutrient requirements by potato seed-lings was N>K>P under the condition of N deficiency .