02318naa a2200253 a 450000100080000000500110000800800410001902200140006002400390007410000190011324500910013226000090022352016140023265000100184665000130185665000260186965000160189565000170191165000110192865000140193965000100195370000200196377300810198319889872015-02-26       2014    bl uuuu     u00u1 u    #d  a0190-41677 a10.1080/01904167.2014.920362.2DOI1 aFAGERIA, N. K.  aNitrogen, phosphorus and potassium interactions in upland rice.h[electronic resource]  c2014  aUpland rice is an important crop in South America, including Brazil. Nutrient interactions are important in determining crop yields. A greenhouse experiment was conducted to evaluate interaction among nitrogen (N), phosphorus (P), and potassium (K) in upland rice production. The treatments applied to upland rice grown on an Oxisol were three levels of N (N0, N150and N300mg kg−1), three levels of P (P0, P100and P200mg kg−1) and three levels of K (K0, K100and K200mg kg−1). These treatments were tested in a 3 × 3 × 3 factorial arrangement. Grain yield, shoot dry weight, plant height, root dry weight, maximum root length, panicle number, 1000-grain weight, and grain harvest index were significantly influenced by N, P, and K treatments. The treatment that did not receive P fertilization did not produce panicle or grain. Hence, P was most yield-limiting nutrient compared to two other nutrients. At the N0P0K0treatment, rice did not produce grains, indicating severe deficiency of these nutrients in Brazilian Oxisols. Maximum grain yield was obtained with the N300P200K200treatment. Grain yield had significant positive association with plant height, shoot dry weight, root dry weight, maximum root length, 1000-grain weight, panicle number, and grain harvest index. Among these growth and yield components, shoot dry weight had the highest positive association with grain yield and root length minimum positive association with grain yield. Hence, adopting adequate soil and crop management practices can improve growth and yield components and increase grain yield of upland rice.  aArroz  aFósforo  aInteração genética  aNitrogênio  aOryza sativa  aOxisol  aPotássio  aRaíz1 aOLIVEIRA, J. P.  tJournal of Plant Nutrition, New Yorkgv. 37, n. 10, p. 1586-1600, Aug. 2014.