תפריט נגישות
ניגודיות עדינהניגודיות גבוהה
מונוכרום
הדגשת קישורים
חסימת אנימציה
פונט קריא
סגור
איפוס הגדרות נגישות
להורדת מודול נגישות חינם תפריט נגישותניגודיות עדינהניגודיות גבוההמונוכרוםהדגשת קישוריםחסימת אנימציהפונט קריאסגוראיפוס הגדרות נגישותלהורדת מודול נגישות חינםB. BAR-YOSEF,
E. BRESLER,
U. KAFKAFi
Fluxes of P uptake by corn (Zea mays L.) plants growing in the field under high and low P fertilization levels, were both predicted by an uptake model, and obtained experimentally in the field by a new technique. The computed fluxes were averaged over a period of 1 week to give values of 4.8 X 10~5 and 1.7 X 10~5 pg P cm~2 sec"1 at the high and low P levels in the soil, respectively. These values were lower than the experimental weekly average fluxes which, at the critical growth period (between the 5th and 7th weeks), equaled about 6.8 X 10~5 and 2.5 X 10~5 /j.g P cm ~ 2 sec"1 , correspondingly. The deviation of the real conditions prevailing in the field from those assumed in the model tended, qualitatively, to explain the discrepancy. It is shown that the computed flux of f uptake is more sensitive to variations in the soil than in the plant parameters.
B. BAR-YOSEF,
E. BRESLER,
U. KAFKAFi
Fluxes of P uptake by corn (Zea mays L.) plants growing in the field under high and low P fertilization levels, were both predicted by an uptake model, and obtained experimentally in the field by a new technique. The computed fluxes were averaged over a period of 1 week to give values of 4.8 X 10~5 and 1.7 X 10~5 pg P cm~2 sec"1 at the high and low P levels in the soil, respectively. These values were lower than the experimental weekly average fluxes which, at the critical growth period (between the 5th and 7th weeks), equaled about 6.8 X 10~5 and 2.5 X 10~5 /j.g P cm ~ 2 sec"1 , correspondingly. The deviation of the real conditions prevailing in the field from those assumed in the model tended, qualitatively, to explain the discrepancy. It is shown that the computed flux of f uptake is more sensitive to variations in the soil than in the plant parameters.
