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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Pepper Seedling Response to Steady and Transient Nitrogen and Phosphorus Supply
Year:
1990
Source of publication :
Agronomy Journal
Authors :
בר-טל, אשר
;
.
בר-יוסף, בניהו
;
.
כפכפי, עוזי
;
.
Volume :
82
Co-Authors:
Facilitators :
From page:
600
To page:
606
(
Total pages:
7
)
Abstract:

Using transplants for growing pepper (Capsicum annuum L.) is widespread, but little is known about seedling response to transient N and P supply during tbe nursery growth stage. The objective of this work was to study the effect of steady and alternating N and P concentrations in solution culture on pepper seedling development, dry-matter production rate, and N and P uptake rates, to allow better control of production by transplants. Seedlings were grown in trays of pyramidal cells, packed with vermiculite and floated on well-aerated nutrient solutions of high (6 mM) or low (1 mM) N and high (0.25 mM) or low (0.01 or 0.03 mM) P. Dry-matter accumulation in seedling tops as a function of time conformed in all treatments to a first-order exponential equation. The growth rate constant was significantly higher in the high than in the low N or P concentrations. Root growth rate was less affected by the N and P solution concentration than was the top growth rate. Five-day-long alternations of solution concentration from high to low and from low to high N and P significantly changed dry-matter production rate and nutrient content in plants. Growth and uptake rates regained their original values when seedlings were re-exposed for 5 d to the original solutions. The rapid changes in growth rate were attributed to rapid variations in the flux of N and P uptake in response to changes in solution concentrations, which affected N and P concentration in plant organs. Varying N and P concentrations in tops affected drymatter production rate, whereas variations in N and P concentrations in roots influenced the flux of uptake of P and N, respectively.

Note:
Related Files :
Capsicum annuum (pepper)
fertilizer application
nitrogen
Pepper
Phosphorus
plant nutrition
Seedlings
עוד תגיות
תוכן קשור
More details
DOI :
10.2134/agronj1990.00021962008200030033x
Article number:
0
Affiliations:
Database:
גוגל סקולר
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
44506
Last updated date:
02/03/2022 17:27
Creation date:
30/10/2019 14:33
Scientific Publication
Pepper Seedling Response to Steady and Transient Nitrogen and Phosphorus Supply
82
Pepper Seedling Response to Steady and Transient Nitrogen and Phosphorus Supply

Using transplants for growing pepper (Capsicum annuum L.) is widespread, but little is known about seedling response to transient N and P supply during tbe nursery growth stage. The objective of this work was to study the effect of steady and alternating N and P concentrations in solution culture on pepper seedling development, dry-matter production rate, and N and P uptake rates, to allow better control of production by transplants. Seedlings were grown in trays of pyramidal cells, packed with vermiculite and floated on well-aerated nutrient solutions of high (6 mM) or low (1 mM) N and high (0.25 mM) or low (0.01 or 0.03 mM) P. Dry-matter accumulation in seedling tops as a function of time conformed in all treatments to a first-order exponential equation. The growth rate constant was significantly higher in the high than in the low N or P concentrations. Root growth rate was less affected by the N and P solution concentration than was the top growth rate. Five-day-long alternations of solution concentration from high to low and from low to high N and P significantly changed dry-matter production rate and nutrient content in plants. Growth and uptake rates regained their original values when seedlings were re-exposed for 5 d to the original solutions. The rapid changes in growth rate were attributed to rapid variations in the flux of N and P uptake in response to changes in solution concentrations, which affected N and P concentration in plant organs. Varying N and P concentrations in tops affected drymatter production rate, whereas variations in N and P concentrations in roots influenced the flux of uptake of P and N, respectively.

Scientific Publication
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