RESPONSE OF ARTIFICIAL POTATO TO PHOSPHOROUS AND POTASSIUM LEVELS ON AVAILABLE OF SOME NUTRIENTS, AMOUNT ABSORBED AND THEIR PRODUCTIVITY

Abstract

A field experiment was carried out during autumn season of 2020 at one of the fields of the Al-Hamdhiya Research Station, College of Agriculture, Anbar University, to find out response of artificial potato to phosphorous and potassium levels on available of some nutrients, the amount absorbed and their productivity. The experiment was carried out according to randomized complete block design (RCBD) at three replicates. The experiment included seventeen treatments: T1: 200, 0, 0 (control treatment), T2: 200, 0, 100, T3: 200, 0, 200, T4: 200, 0, 300, T5: 200, 144, 0, T6: 200, 192, 0, T7: 200, 240, 0, T8: 200, 144, 100, T9: 200, 192, 100, T10: 200, 240, 100, T11: 200, 144, 200, T12: 200, 192, 200, T13: 200, 240, 200,T14: 200, 144, 300, T15: 200, 192, 300 and T16: 200, 240, 300 Kg NPK.ha-1 respectively, as well as T17: application of organic matter at level of 20 ton.ha-1. The results indicated that theT15 treatment(200, 192, 300 Kg NPK.ha-1) was significantly superior and gave the highest tuber weight (70.11 g),plant tubers yield (677.5 g.plant-1), tubers yield (57.59 Meq.ha-1) and the highest available of N and K in the soil (48.03 and 240 mg.Kg-1 soil) respectively, whereas the T16 treatment (200, 240, 300 Kg NPK.ha-1) gave the highest available of P in the soil (18.91 mg.Kg-1 soil) and the highest plant content of N, P and K (0.66, 0.09 and 0.78Kg.plant-1) respectively with non-significant difference with T15treatment.