scholarly journals Impacts of fertilizer application rates on phosphorus dynamics in salt-affected soil

2017 ◽  
Vol 63 (No. 10) ◽  
pp. 468-474 ◽  
Author(s):  
Niu Ling-An
Keyword(s):  
North China ◽  
Fertilizer Application ◽  
Forming Process ◽  
Salt Affected Soil ◽  
The North ◽  
Application Rates ◽  
P Fertilizer ◽  
Salt Affected Soils ◽  
Uncultivated Land ◽  
Fertilizer Rates

As a new rebuilding agricultural soil on the North China plains, the salt-affected soil had a short soil-forming process of about 30 years. This paper describes the effect of different fertilization systems on phosphorus (P) dynamics in saline-alkali uncultivated land, in the reserved natural salt-vegetation back zone, and in different phases of fertilization for 24 years on the North China plains. The treatments included control (or check, CK), N<sub>1</sub>, N<sub>2</sub>, P<sub>1</sub>, P<sub>2</sub>, N<sub>1</sub>P<sub>1</sub>, N<sub>1</sub>P<sub>2</sub>, N<sub>2</sub>P<sub>1</sub>, N<sub>2</sub>P<sub>2</sub>. The contents of total phosphorus (TP) showed a significantly decreasing trend from 1.32–1.38 gP/kg to 0.40–0.96 g P/kg. The contents of rapidly available P (RP) were low in the no-P fertilizer treatments and the RP concentrations increased with P fertilizer applications. Corn was the crop that used the most P, especially in the no-P and P fertilizer-only treatments. The treatment with 270 kg N/ha/year and 59 kg P/ha/year represents the most economical fertilizer rates for these salt-affected soils on the North China plains.

Influence of intra-row plant spacing, phosphorus application and growth stage on the forage, seed yields and quality of phasey bean (Macroptilium lathyroides) in subhumid area of Nigeria

2021 ◽  
Vol 31 (1) ◽  
pp. 45-50
Author(s):  
A. T. Omokanye ◽  
J. T. Amodu ◽  
S. O. Onifade
Keyword(s):  
Production Systems ◽  
Fertilizer Application ◽  
Plant Spacing ◽  
Growing Seasons ◽  
Application Rates ◽  
P Fertilizer ◽  
P Application ◽  
Macroptilium Lathyroides ◽  
Seed Yields ◽  
Phosphorus Application

Forage, seed yields and herbage chemical composition of phasey bean Macroptilium lathyroides) were investigated at 3 intra-row plant spacings (15, 30 and 45cm between plants; 50 cm between roms), 4 phosphorus (P) fertilizer application rates (O), 50, 100 and 750 kg/ha P) and 5 harvest stages (uncut control, 6, 9, 12 and 15 weeks post sowing) in two growing seasons at Shika in northern Nigeria. The least intra-row plant spacing (15cm) produced higher (p<0.01) total DM vield (1.50 t/ha) than wider spacings. The proportion of leaf was least (40 %) in the widest spacing compared with other spacings (59-62 %). The P-fertilized plots produced 58-60% more total DM vields than the unfertilized plots and total DM yields increased with advanced plant growth. The highest percentage (61-63) of leaf was recorded from 6 to 12 weeks post sowing. Nitrogen level in herbage increased (p<0.05) with increased intra-row plant spacing and P application. Phosphorus and Calcium. Levels in herbage did not respond to intra-row plant spacing but increased with P application. The Ca:P ratios at the harvest stages were between 1:1 and 6:1. The highest seed yields (198 and 188 kg/ha) were recorded respectiely in the least intra-row plant spacing and the application of 100 kg Piha. Supplementation of calves on grasses/cereal stovers with phasey bean hay in a sustainable crop livestock production systems is suggested.

scholarly journals 127 Growth of Impatiens `Accent Orange' in Substrates Containing Compost with Four Slow-release Fertilizer Concentrations

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 463D-463
Author(s):  
Kimberly Klock-Moore
Keyword(s):  
Slow Release ◽  
Dry Mass ◽  
Fertilizer Application ◽  
Application Rate ◽  
Slow Release Fertilizer ◽  
Application Rates ◽  
Fertilizer Application Rate ◽  
Fertilizer Rates ◽  
Pot Plants

The objective of this experiment was to compare the growth of impatiens `Accent Orange' in substrates containing compost made from biosolids and yard trimmings with four slow-release fertilizer application rates. Plugs of impatiens were transplanted into 400-ml pots filled with 100% compost as a stand-alone substrate or with 60%, 30%, or 0% compost combined with control substrate components. Six days after transplanting, all plants were top-dressed with 0.5, 1, 2, or 4 g of Nutricote 13N-5.7P-10.8K (type 180) per pot. Shoot dry mass increased as the percentage of compost in the substrate increased from 0% to 100%. Shoot dry mass also increased as the fertilizer application rate increased from 0.5 to 4 g per pot. Plants grown in 30% and 60% compost with 0.5 g of fertilizer were similar in size to plants grown in 0% compost with 4 g of fertilizer per pot. Plants grown in 100% compost at all of the fertilizer rates were larger than all other plants in this study.

Effects of rate, placement, and frequency of P application on yield and P content of bromegrass-red clover herbage and soil P distribution

1997 ◽  
Vol 77 (1) ◽  
pp. 77-81 ◽  
Author(s):  
Y. K. Soon
Keyword(s):  
Trifolium Pratense ◽  
Red Clover ◽  
Fertilizer Application ◽  
P Availability ◽  
Soil P ◽  
Application Rates ◽  
Herbage Yield ◽  
P Fertilizer ◽  
Trifolium Pratense L ◽  
P Distribution

This study was conducted on a P-deficient Dark Grey Solod to compare the effects of the rate (0, 45, 90 kg P ha−1 cumulative), placement method (broadcast vs. banding), and frequency (preplant only vs. annually) of P fertilizer application on herbage production by a bromegrass (Bromus inermiss Leyss)–red clover (Trifolium pratense L.) mixture. The preplant broadcast application was incorporated by rototilling, and subsequent broadcast applications were topdressings. Annual applications continued for 3 yr only and dry matter (DM) yields were taken for 4 yr following the establishment year in 1991. Rate of P applied had the greatest effect on herbage yield, but its effect was influenced by the frequency of application. When P fertilizer was applied annually, herbage yields increased linearly with application rates. When P was applied preplant only, herbage yields reached a plateau with 45 or more kg P ha−1. Broadcasted P yielded slightly more than banded-in P in the first year harvest only. Annual application of 30 kg P ha−1 gave the highest cumulative herbage yield, suggesting decreasing P availability with time. This was supported by soil P analysis in 1994 and by herbage P concentrations. Herbage P concentration was significantly correlated with herbage yields of the second year and subsequent harvests. It is concluded that a preplant broadcast-incorporated application of 30 to 45 kg P ha–1, followed by at least one subsequent surface application of 30 kg P ha–1 was required for optimum herbage production by a legume-grass mixture. Key words: Application method, P fertilizer management, bromegrass-red clover, Grey Luvisol, soil P distribution

Sign in / Sign up

Export Citation Format

Share Document