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פותח על ידי קלירמאש פתרונות בע"מ -
Rates of growth and nutrient uptake of irrigated corn as affected by N and P fertilization
Year:
1972
Authors :
בר-יוסף, בניהו
;
.
כפכפי, עוזי
;
.
Volume :
36
Co-Authors:

B. Bar‐Yosef  

U. Kafkafi

Facilitators :
From page:
931
To page:
936
(
Total pages:
6
)
Abstract:

Growth rates of corn and weekly uptake of major nutrients were measured in a permanent plot fertilization experiment. Bicarbonate‐soluble P and NO3‐N concentration in the soil were measured four times during the growing period. High levels of nitrates in the soil (140 ppm NO3‐N) during the first month of growth suppressed dry matter production. An increase in soil phosphate concentration resulted in higher phosphate uptake and early appearance of male flowers. On the control plots, which had not received any phosphatic fertilizer for 8 years, the plants took up more phosphate than the amount estimated by the bicarbonate method. The high levels of nitrates which were found in the soil 4 weeks after seeding (140 and 70 ppm N) dropped within the fifth week to a level of 20‐10 ppm N. Denitrification to gaseous compounds in the presence of living plants due to 68 mm of sprinkler‐applied water is proposed as an explanation of this phenomenon.

In order to support satisfactory plant development, the soil must be able to supply at least 900 mg N and 100 mg P per week to each plant. Uptake flux values for P and N ranged between 2.6 and 22.8 × 10‐6 µg P cm‐2 sec‐1 and between 4.1 and 22.5 × 10‐5 µg N cm‐2 sec‐1, and were affected by plant age and fertilizer application.

Note:
Related Files :
corn
plant nutrition
Zea mays
עוד תגיות
תוכן קשור
More details
DOI :
10.2136/sssaj1972.03615995003600060028x
Article number:
0
Affiliations:
Database:
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
52806
Last updated date:
02/03/2022 17:27
Creation date:
29/12/2020 21:32
Scientific Publication
Rates of growth and nutrient uptake of irrigated corn as affected by N and P fertilization
36

B. Bar‐Yosef  

U. Kafkafi

Rates of growth and nutrient uptake of irrigated corn as affected by N and P fertilization

Growth rates of corn and weekly uptake of major nutrients were measured in a permanent plot fertilization experiment. Bicarbonate‐soluble P and NO3‐N concentration in the soil were measured four times during the growing period. High levels of nitrates in the soil (140 ppm NO3‐N) during the first month of growth suppressed dry matter production. An increase in soil phosphate concentration resulted in higher phosphate uptake and early appearance of male flowers. On the control plots, which had not received any phosphatic fertilizer for 8 years, the plants took up more phosphate than the amount estimated by the bicarbonate method. The high levels of nitrates which were found in the soil 4 weeks after seeding (140 and 70 ppm N) dropped within the fifth week to a level of 20‐10 ppm N. Denitrification to gaseous compounds in the presence of living plants due to 68 mm of sprinkler‐applied water is proposed as an explanation of this phenomenon.

In order to support satisfactory plant development, the soil must be able to supply at least 900 mg N and 100 mg P per week to each plant. Uptake flux values for P and N ranged between 2.6 and 22.8 × 10‐6 µg P cm‐2 sec‐1 and between 4.1 and 22.5 × 10‐5 µg N cm‐2 sec‐1, and were affected by plant age and fertilizer application.

Scientific Publication
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