تأثير التسميد البوتاسي و التغذية الورقية بالزنك و محتوى التربة من الجبس في امتصاص العناصر الغذائية لمحصول الذرة الصفراء L. Zea mays

الملخص EN

Field experiment was Conducted in season of 2019 year at the University of Tikrit / college of Agriculture.

In two location differ in their gypsum content (4.78 % and 17.69 %).

RCBD design with three Factors (Four K rates 0.0 , 80 , 120 , 200 kg K.

h-1).

Two gypsum soil contents 4.78 % and 14.61 % , and three Zinc rates (0.0 , 1 , 2 kg Zn.

h-1) were used.

The following results were Found.

Application of K fertilization increased the dry weight of corn where the percentage increase were 17.45 % , 21.26 % and 38.68 % respectively as compared to control treatment.

Soil with high gypsum decreased significantly the corn dry weight by 20.66 % > The results al so showed that the foliar of Zn significantly increase the Dry weight of corn.

The percentage increase were 6.73 % and 13.67 % for both Zn1 and Zn2 as compared to Zn0.

Location I gave higher yield at the treatment K3Zn2 where its percentage increase was 89.40 as compared to the treatment K3Zn2 at location 2 which gave the lowest yield.

K application showed significant increase in nutrients uptake in the green shoot of corn, where the % increase of N were (43.11 % , 56.73 % and 91.90 %) while with P (48.49 , 125.81 % and 189.0 %) and for K (100.25 %, 182 % and 294 %).

For Zn the % increase in shoot dry weight were (38.81 % , 52.51 % and 93.09 %) treatment.

The higher gypsum content decreased the uptake of the N, P, K, Zn and % decreased were 30.01 % , 69.35 % , 47.53, and 29.92 % for N, P, K and Zn respectively.

Zinc application showed Significant increased in nutrients uptake, where the % increase for N were (14.42 % and 34.38 %) for p (17.09 % and 37.34 %) for K (25.13 % and 51.54 %) and for Zn (26.85 % and 49.75 %) for Zn1 and Zn2 as compared to Zn0 treatment.