The effect of mineral fertilization on the development, yield and element uptake of poppy and on the AL-soluble PK content of the soil was investigated in 1998 in the 28th year of a long-term NPK mineral fertilization experiment set up on calcareous sandy soil at the Experimental Station of RISSAC in Õrbottyán. The soil was poorly supplied with macronutrients (NPK), while the ploughed layer contained 1% CaCO 3 and 1% humus, with pH(H 2O) 7.3 and pH(KCl) 7.0 on average. The subsoil was strongly calcareous, with 5-10% clay content. The groundwater depth was 8-10 m and the area was drought sensitive. The P (0, 60 and 120 kg P 2O 5/ha/year) and K fertilizers (0, 40, 80, 120 and 160 kg K 2O/ha/year from 1971-1989 and 0, 100, 200, 300 and 400 kg from 1990) were applied in autumn prior to ploughing, together with half the N rate (0, 80, 160 kg N/ha/year), while the remaining N was applied in spring. The fertilizers were given in the form of 25% calcium ammonium nitrate, 18% superphosphate and 50% potassium chloride. The main conclusions were as follows: - The 0.22 t/ha seed yield recorded in the control was doubled on average by NP fertilization, while the addition of K fertilizers almost tripled the yield. NPK fertilization caused similar increases in the capsule and straw mass. Poppy required values of 150-200 mg/kg AL-soluble P 2O 5 and K 2O in the ploughed soil layer. - Averaged over the NP levels there was a rise in the N, S, P and Sr contents in the stem and in part in the capsule, while the Zn content declined. K fertilization led to an increase in the K concentration and a decrease in that of Sr. NP fertilization stimulated the incorporation of N, P, Sr, Zn and Cu into the seed, but inhibited the uptake of Zn and B. Instead of K-Sr antagonism, K-Sr synergism was observed in the seed. - The highest element contents were observed for N, P, Mn, Zn and Cu in the seed, for K, S, B and Na in the capsule and for Ca and Sr in the stem. The low yield was associated with low nutrient uptake. The specific element contents were 73 kg N, 23 kg P (53 kg P 2O 5), 92 kg K (110 kg K 2O), 92 kg Ca (129 kg CaO) and 15 kg Mg (25 kg MgO), averaged over the whole experiment. - When calculating the nutrient requirements for the planned yield, the specific guidelines of 100-40-120 kg N-P 2O 5-K 2O/t seed + by-products previously reported can still be recommended.
|Translated title of the contribution||Effect of mineral fertilization on poppy (Papaver somniferum L.) grown on calcareous sandy soil|
|Number of pages||12|
|Journal||Agrokemia es Talajtan|
|Publication status||Published - Jun 1 2009|
ASJC Scopus subject areas
- Agronomy and Crop Science
- Soil Science