DRIP-FERTIGATION – A MEANS FOR REDUCING FERTILIZER NITROGEN TO SUGARCANE

1999 ◽  
Vol 35 (1) ◽  
pp. 31-37 ◽  
Author(s):  
K.F. Ng Kee Kwong ◽  
J.P. Paul ◽  
J. Deville
Keyword(s):  
Field Experiment ◽  
Growth Pattern ◽  
Drip Irrigation ◽  
Climatic Conditions ◽  
Fertilizer N ◽  
Fertilizer Nitrogen ◽  
Tiller Density ◽  
Area Development ◽  
Leaf Area Development ◽  
Drip Fertigation

The extent by which fertilizer nitrogen (N) may be reduced by the use of drip-fertigation in sugarcane was determined using 15N-labelled fertilizer in a field experiment in Mauritius. The data showed that, under the soil and climatic conditions that prevailed at the study site, fertilizer N could be reduced by 30%. Indeed, with 80 kg N ha−1 a−1 by drip-fertigation, total or fertilizer N recovered, growth pattern (as reflected by tiller density and leaf area development) and sugarcane yields were not inferior to those obtained with the standard practice of burying 120 kg N ha−1 a−1 along the cane rows. Applying more N than needed by the sugarcane in anticipation of a higher yield with drip irrigation would be wasteful of fertilizer N resources.

Leaf Area Development, Light Interception, and Yield among Switchgrass Populations in a Short‐Season Area

Crop Science ◽  
1998 ◽  
Vol 38 (3) ◽  
pp. 827-834 ◽  
Author(s):  
I. C. Madakadze ◽  
B. E. Coulman ◽  
P. Peterson ◽  
K. A. Stewart ◽  
R. Samson ◽  
...  
Keyword(s):  
Leaf Area ◽  
Light Interception ◽  
Short Season ◽  
Area Development ◽  
Leaf Area Development

scholarly journals Effect of Drip Fertigation with Nitrogen on Yield and Nutritive Value of Melon Cultivated on a Very Light Soil

Agronomy ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 934
Author(s):  
Roman Rolbiecki ◽  
Stanisław Rolbiecki ◽  
Anna Figas ◽  
Barbara Jagosz ◽  
Dorota Wichrowska ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Nutritive Value ◽  
Nutrient Retention ◽  
Marketable Yield ◽  
Total Carotenoids ◽  
Retention Capacity ◽  
Total Sugars ◽  
Light Soil ◽  
Two Factors ◽  
Drip Fertigation

Most species of Cucurbitaceae respond favorably to irrigation, especially when combined with fertilizers. The effect of drip irrigation combined with nitrogen fertigation in melon grown on a very light soil in Central Poland, during 2013–2015, was evaluated. The field experimental design was a split-plot with four replications. Two factors were studied: (1) irrigation treatments applied in two combinations—drip irrigation + broadcast nitrogen fertilization (control), and drip irrigation + fertigation with nitrogen; (2) two cultivars—Melba and Seledyn. The total marketable yield of fruits, weight of a single fruit, and the concentration of dry matter, total sugars, monosaccharides, ascorbic acid, total carotenoids, and polyphenols were evaluated. Tested factors presented a significant effect both on the yield and nutritive value characteristics. Drip irrigation combined with nitrogen fertigation, comparing to the control, notably improved yields and nutritional value of fruits. Seledyn produced better yields than Melba. This study shows that on very light soil, with low water and nutrient retention capacity, melon should be drip-irrigated and nitrogen-fertigated to obtain the best cultivation results.

scholarly journals Effects of applications of sewage sludge and fertilizer nitrogen on cadmium and lead contents of grass.

1983 ◽  
Vol 31 (3) ◽  
pp. 227-232
Author(s):  
O.J. Hemkes ◽  
A. Kemp ◽  
L.W. van Broekhoven
Keyword(s):  
Sewage Sludge ◽  
Fertilizer N ◽  
Fertilizer Nitrogen ◽  
Late Autumn ◽  
Permanent Grassland ◽  
Cadmium And Lead ◽  
Autumn And Winter ◽  
Sludge Application

During 5 successive years, 0, 6, 12 or 18 t/ha yr metal-bearing sewage sludge on a DM basis was applied to permanent grassland. Each sludge application was combined with various N treatments. Cd content of the grass increased considerably with increasing amounts of sewage sludge and fertilizer N; Cd content was higher in young than in old grass. The latter also applied to Pb but the increase in Pb content was less and the relation between the supply of Pb and the Pb content of the grass was poor. During the late autumn and winter the increase in Pb content was striking and was probably caused by pollution from the atmosphere. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Herbage and animal production responses to fertilizer nitrogen in perennial ryegrass swards. II. Rotational grazing and cutting

1999 ◽  
pp. 243-261 ◽  
Author(s):  
E.A. Lantinga ◽  
P.J.A.G. Deenen ◽  
H. Van Keulen
Keyword(s):  
Perennial Ryegrass ◽  
System Level ◽  
Soil Types ◽  
Fertilizer N ◽  
Negative Effects ◽  
Rotational Grazing ◽  
Sand Soil ◽  
N Application ◽  
Fertilizer Nitrogen ◽  
Grazing Cattle

The yield response of grass swards to fertilizer nitrogen (N) differs under cutting and grazing, as grazing cattle exert positive and negative effects on pasture production, with varying negative effects on different soil types. Nevertheless, current N fertilization recommendations in the Netherlands are based mainly on economic cost-benefit analyses of long-term cutting trials in small plots. To contribute to formulation of improved N fertilizer recommendations for grassland, experiments were carried out on two soil types and under different management regimes. The effect of fertilizer N application on grassland production and sward quality in perennial ryegrass swards was studied during a number of consecutive years under both rotational grazing and 4-weekly cutting. Experiment 1 was performed with dairy cows on a loam soil at 250 and 550 kg fertilizer N ha-1 year-1. Experiment 2 was performed with beef cattle on a sand soil and fertilizer rates varying from 250 to 700 kg N ha-1 year-1 under grazing and from 0 to 700 kg N ha-1 year-1 under cutting. The results indicate that on loam, N had no effect on sward quality. In the second experimental year, total herbage yield under grazing was almost 10% higher than under cutting at 250 kg N ha-1 year-1 due to recycling of N, whereas at 550 kg N ha-1 year-1 the yield under grazing and cutting was the same. On sand, the economically optimum fertilizer application rate was on average 430 kg N ha-1 year-1 for 4-weekly cutting. Under grazing and at whole system level (integrated grazing and mowing for silage), the optimum rate was below 250 kg N ha-1 year-1. Under grazing on the sand soil, N aggravated sward deterioration due to treading, poaching and especially urine scorching. This was reflected in an increased absence frequency of rooted perennial ryegrass tillers in quadrats with an area of 1 dm2 at increasing fertilizer N application rates. It is concluded that current fertilizer N recommendations for grassland can be further refined by taking into account the positive and negative effects of grazing cattle, in dependence of soil type and level of N supply.

RELATIVE EFFICIENCY OF FERTILIZER N AND SOIL NITRATE AT VARIOUS DEPTHS FOR THE PRODUCTION OF SOFT WHITE WHEAT

1989 ◽  
Vol 69 (4) ◽  
pp. 867-874 ◽  
Author(s):  
J. M. CAREFOOT ◽  
T. ENTZ ◽  
J. B. BOLE
Keyword(s):  
Interactive Effect ◽  
Soil Layer ◽  
Yield Response ◽  
Soil Nitrate ◽  
Fertilizer N ◽  
Marginal Rate ◽  
Fertilizer Nitrogen ◽  
White Wheat ◽  
Wide Range ◽  
Low Levels

Soft white wheat was grown on a clay loam soil for 2 yr with a wide range of soil nitrate (SN) (70–280 kg ha−1) and fertilizer nitrogen (FN) (0–400 kg ha−1) treatments The field experiment was designed to determine the slopes of the yield response curves to FN (δy/δFN) and to SN (δy/δSN), to determine how the ratio of (δy/δSN)/(δy/δFN), or marginal rate of substitution, is affected by FN, SN, and depth of SN and to determine if refinements to the current FN recommendations for irrigated soft white wheat are required. The δy/δFN values in both years were high at low levels of FN and SN but declined as FN and SN increased. The δy/δSN in 1985 when most SN was situated in the 0- to 30-cm soil layer was initially high (26.0) at low levels of SN but rapidly declined as SN increased. The δy/δSN in 1986, when most SN was situated in the 30- to 120-cm soil layer, was intially low (6.0) but increased as SN increased. Since the δy/δFN and δy/δSN values were sensitive to changes in FN and SN as well as the depth of SN the MRS values were variable in both years. The δy/δSN increased as SN increased when SN was situated in the 30- to 120-cm soil layer so there was only a small effect of depth of SN on FN recommendations. The FN at maximum profit occurred at a greater combined amount of SN and FN for the higher SN levels in both years. This preliminary field study suggested that fertilizer N recommendations could be improved by using an equation for predicting FN that considers a variable yield response to FN and SN, an interactive effect of FN and SN on yield, and an effect of depth of SN on yield. Key words: Soil nitrate, fertilizer nitrogen, soft white wheat, soil test N

Recovery of Fertilizer-Nitrogen by Rice Grown in a Greenhouse Under Varying Soil- and Climatic Conditions

1981 ◽  
pp. 678-688
Author(s):  
A. C. B. M. van der Kruijs ◽  
J. C. P. M. Jacobs ◽  
P. D. J. van der Vorm ◽  
A. van Diest
Keyword(s):  
Climatic Conditions ◽  
Fertilizer Nitrogen

Leaf area development and yield of cassava in response to pruning of shoots and the late supply of nitrogen and potassium

2020 ◽  
Vol 112 (2) ◽  
pp. 1406-1422
Author(s):  
Lydia Helena S.O. Mota ◽  
Adalton M. Fernandes ◽  
Natália S. Assunção ◽  
Hugo M.F. Leite
Keyword(s):  
Leaf Area ◽  
Area Development ◽  
Leaf Area Development

Contribution of legumes to the fertilizer nitrogen economy in a maize-based cropping system

1985 ◽  
Vol 105 (3) ◽  
pp. 491-493 ◽  
Author(s):  
R. K. Singh ◽  
R. De ◽  
R. B. Lal
Keyword(s):  
Pisum Sativum ◽  
Field Experiment ◽  
Grain Yield ◽  
Cropping System ◽  
Lathyrus Sativus ◽  
Trifolium Alexandrinum ◽  
Maize Crop ◽  
Egyptian Clover ◽  
Fertilizer Nitrogen ◽  
Cropping Seasons

SUMMARYA field experiment conducted for two cropping seasons (1976–7 and 1977–8) showed that a fodder crop of Egyptian clover (Trifolium alexandrinum) increased the grain yield of a subsequently grown maize crop. Lathyrus (Lathyrus sativus) and peas (Pisum sativum) were less effective in this regard.

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