scholarly journals Growth and Yield of Watermelon on Polyethylene Mulch with Different Spacings and Nitrogen Rates

HortScience ◽  
2005 ◽  
Vol 40 (2) ◽  
pp. 366-369 ◽  
Author(s):  
Smiljana Goreta ◽  
Slavko Perica ◽  
Gvozden Dumicic ◽  
Lovre Bucan ◽  
Katja Zanic
Keyword(s):  
Size Distribution ◽  
Field Experiments ◽  
Fruit Size ◽  
Fruit Weight ◽  
Growth And Yield ◽  
Planting Density ◽  
Plant Spacing ◽  
N Rates ◽  
Polyethylene Mulch ◽  
Leaf N

Suggested watermelon planting densities and N rates vary on a large scale, indicating that there is insufficient knowledge about their effects. Therefore, the objective of this study was to evaluate the effects of N rate and planting density on growth, yield and quality of watermelon [Citrullus lanatus (Thunb.) Matsum & Nakai] grown on black polyethylene mulch. The field experiments with `Crimson Sweet' watermelon were conducted in two climatologically different growing regions. The treatments were factorial combinations of three in-row plant spacings (0.5, 1.0, and 1.5 m) and three N rates (115, 195, and 275 kg·ha-1). Part of the N (35 kg·ha-1) was applied preplant and the remainder was fertigated. Vine length increased linearly up to 7 weeks after planting (WAP) as N rate increased from 115 to 275 kg·ha-1, and up to 9 WAP as plant spacing increased from 0.5 to 1.5 m. Total and marketable yields per ha or per plant did not increase with N rates above 115 kg·ha-1. Average fruit weight and fruit size distribution were generally unaffected by N rate. Leaf N concentration increased as N rate increased, although leaf N concentrations at the lowest N rate (115 kg·ha-1) even at 9 WAP were relatively high (43.3 to 47.3 g·kg-1). Total and marketable yields per ha were linearly decreased with an increase in plant spacing from 0.5 to 1.5 m, and the same was noticed with the total and marketable number of fruit per ha. With increased plant spacing average fruit weight increased and fruit size distribution shifted to larger categories.

scholarly journals Black Polyethylene Mulch Doubled Yield of Fresh-market Field Tomatoes

HortScience ◽  
1992 ◽  
Vol 27 (7) ◽  
pp. 787-789 ◽  
Author(s):  
Aref Abdul-Baki ◽  
C. Spence ◽  
R. Hoover
Keyword(s):  
Field Experiments ◽  
Total Yield ◽  
Fruit Size ◽  
Fruit Weight ◽  
Planting Date ◽  
Trickle Irrigation ◽  
Fresh Market ◽  
Planting Dates ◽  
Early Production ◽  
Polyethylene Mulch

Field experiments were conducted to a) maximize total yield of fresh-market field tomato (Lycopersicon esculentum Mill.) cultivars using black polyethylene mulch (BPM), and b) increase fruit size and yield during the last 5 weeks of the production period by reducing the number of synthate sinks per plant through eliminating all flowers that appeared during this period. Unmulched treatments under trickle irrigation and multiple applications of soluble fertilizer yielded an average of 43 t·ha-1 for `Sunny' and `Pik-Rite' over the two planting dates. With BPM, total yield increased by 95% to 84 t·ha-1. Although total yield increases due to BPM over the control were highly significant in both cultivars and over the two planting dates, yield increases were higher for the early than for the optimum planting date. BPM also significantly increased early production of `Pik-Rite' but not `Sunny', and the increase in early production was more pronounced for the optimum than the early planting date. Sink reduction during the last 5 weeks of the growing season had no effect on yield or fruit weight during that period.

Effects of paclobutrazol and nitrogen fertilizer on the growth and yield of maize

1997 ◽  
Vol 128 (4) ◽  
pp. 425-430 ◽  
Author(s):  
G. O. IREMIREN ◽  
P. O. ADEWUMI ◽  
S. O. ADULOJU ◽  
A. A. IBITOYE
Keyword(s):  
Plant Height ◽  
Dry Matter ◽  
Field Experiments ◽  
Dry Weight ◽  
N Fertilizer ◽  
Growth And Yield ◽  
Application Rates ◽  
Weight Yield ◽  
N Rates ◽  
Leaf N

In two field experiments conducted in 1991 and 1992 at Akure, Nigeria, 0–12 and 0–24 ml/l of the plant growth regulator, paclobutrazol, and 0, 75 and 150 kg N/ha were applied to maize in factorial combinations. Substantial vegetative growth occurred with increasing N rates in 1991 and this accelerated 50% silking date. Paclobutrazol influenced maize growth at this stage only in 1992 when 12 and 24 ml/l depressed plant height and increased both stem girth and leaf number/plant.Higher paclobutrazol application rates decreased plant height at maturity in both years while, in 1991, 150 kg N/ha enhanced it, and also stem girth and shoot dry matter yield. In 1991, both ear and grain dry weight yield/m2 increased with higher N rates while in 1992 4–24 ml/l paclobutrazol enhanced ear dry yield/m2 compared with untreated maize.Both chlorophyll a and b in the ear leaf increased with higher rates of paclobutrazol and N fertilizer, except in 1992 when high leaf N tended to mask the effect of paclobutrazol. N fertilizer in 1991 enhanced the contents of N and Ca in the ear leaf while depressing P, compared with untreated maize.

scholarly journals Impact of Nitrogen Levels and Planting Density on the Growth and Yield of Okra (Abelmoschus esculentus L. Moench)

2021 ◽  
Vol 9 (8) ◽  
pp. 1467-1473
Author(s):  
Funda Yoldaş ◽  
Şafak Ceylan ◽  
İbrahim Duman ◽  
Ömer Lütfü Elmacı ◽  
Eftal Düzyaman
Keyword(s):  
Plant Height ◽  
Field Experiments ◽  
Total Yield ◽  
Fruit Weight ◽  
Potassium Sulfate ◽  
Growth And Yield ◽  
Planting Density ◽  
Nitrogen Levels ◽  
Plant Densities ◽  
And Training

The study was carried out to the effects of different plant densities and nitrogen levels on okra yield and plant development. Field trials were conducted in two locations, the training fields of the Ege University, Ödemiş Research and Training area, and Ege University Faculty of Agriculture, Menemen Research and Training Farm. The field layout was a split-plot design with 3 replicates, where main plots consisted of nitrogen applications and sub-plots of plant densities. Fertilizer was applied in the form of Triple Superphosphate, Potassium Sulfate, Urea and Ammonium Nitrate. Five different nitrogen levels (F1: 0, F2: 40, F3: 80; F4: 120 and F5: 160 kg N ha-1) and two different rows spacing (PD1: 15 cm×70 cm and PD2: 25 cm×70 cm) have been tested. Yield and yield components, plant height at flowering, height of the first fruits, the number of leaves, the number of branches, the number of days from sowing to first flowering, the number of days from sowing to first harvest, plant height, foliation status, total yield, yield of plant, average fruit weight, fruit length, fruit diameter have been noted in the field experiments. Total yield ranged from 5923.8 to 12888.9 kg ha-1 at the Ödemiş location, while it was 3363.3-5009.2 kg ha-1 at the Menemen location. In conclusion, the highest yield is taken from F2 in both plant densities in Ödemiş. In Menemen, the highest yield is taken from the dose of F3 (80 kg Nha-1) and F4 (120 kg Nha-1).

scholarly journals Plant Density and Inter-row Polyethylene Mulch Treatment Affect Growth and Yield of Tomato

HortScience ◽  
2000 ◽  
Vol 35 (5) ◽  
pp. 829A-829
Author(s):  
Amy Ouellette ◽  
J. Brent Loy
Keyword(s):  
Plant Density ◽  
Plant Biomass ◽  
Fruit Size ◽  
Biomass Accumulation ◽  
Reproductive Organs ◽  
Linear Increase ◽  
Growth And Yield ◽  
Plant Spacing ◽  
Main Effects ◽  
Polyethylene Mulch

A field study was conducted to compare the effect of different planting densities and polyethylene mulch treatments on growth and yield of `Mountain Fresh' trellised tomato grown on raised beds on 1.8-m centers. The experiment design was a split plot with four replications and four mulch treatments as main effects: 1) standard black mulch (B), 2) Sonoco red mulch (R), 3) black mulch with interrow (between beds) reflective white on black mulch (B/W), and 4) red mulch with inter-row R/W. Subtreatments were three within-row spacings: 1) 0.60 m (8966 plants/ha); 2) 0.45 m (11955 plants/ha; standard spacing), and 3) 0.30 m (17932 plants/ha). Yield was determined from eight-plant plots and adjacent plants were harvested at regular intervals to determine plant biomass accumulation and partitioning of biomass among roots, stems, leaves, and reproductive organs. There was a linear increase in yield among mulch treatments with increasing plant density. The B/W mulch treatment increased midseason and total yields ≈20% over that of the other mulch treatments. Fruit yield of plants with the B/W mulch treatment at the 0.3-m spacing was 54% higher (151 MT/ha) than that of plants grown on black mulch with the standard plant spacing of 0.45 m (97.9 MT/ha). There was a linear decrease in fruit size with increasing plant density; however, plants grown at the 0.30-m spacing on the B/W mulched plots exhibited only a 2.7% decrease in fruit size as compared to plants grown at the standard 0.45-m spacing on black mulch.

scholarly journals Predicted Crop Value for a Cling Peach and Three Nectarines of Different Harvest Seasons as a Function of Crop Load

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 995C-995
Author(s):  
Gabino Reginato ◽  
Terence Robinson ◽  
Victor Garcia de Cortazar
Keyword(s):  
Size Distribution ◽  
Field Experiments ◽  
Fruit Size ◽  
Fruit Weight ◽  
High Yield ◽  
Crop Load ◽  
Yield Efficiency ◽  
Small Fruit ◽  
Wide Range ◽  
On Farm

Several field experiments to assess the effect of tree size and crop load on fruit size and yield were conducted in a `Ross' cling peach orchard and in three nectarine orchards of different harvest seasons in Chile. Trees were randomly selected in each orchard and then hand-thinned at the beginning of pit hardening to a wide range of crop loads. The fraction of above-canopy photosynthetically active radiation intercepted by the canopy (PARi) was determined at harvest and all fruits were counted, weighted, and average fruit weight calculated. Cropload and yield were expressed in terms of fraction of PARi. Data on farm gate prices for export fruit of different sizes and export dates were obtained from a Chilean export company. For each orchard, the relationship between cropload and fruit size or cropload and yield efficiency was assessed by regression analysis. Fruit size distribution was calculated from adjusted fruit size assuming a normal fruit size distribution and valued according to shipment date and price. Using crop load as a covariate, fruit size adjusted for cropload was calculated for each nectarine orchard. Differences in adjusted fruit size and yield efficiency were detected among cultivars. Predicted crop value, normalized in terms of PARi intercepted, was calculated for all the cultivars. Large differences in predicted crop value were found for early, mid-season, and late-ripening nectarines. The early and late ripening cultivars showed the highest predicted crop value, especially at lower crop loads and larger fruit sizes. On the other hand, `Ross' cling peach showed its highest crop value at a medium crop load with high yield and relatively small fruit size. (Funded by FONDECYT grant 1930695.)

Effect of Plant Spacing on Growth and Yield of Rice (Oryza sativa L.) under Submerged Condition

2019 ◽  
pp. 1-6
Author(s):  
Bhuneshwar Verma ◽  
L. K. Ramteke ◽  
M. Shahid
Keyword(s):  
Oryza Sativa L ◽  
Block Design ◽  
Rice Variety ◽  
Rice Cultivar ◽  
Growth And Yield ◽  
Planting Density ◽  
Plant Spacing ◽  
Submerged Condition ◽  
Rabi Season ◽  
Randomized Complete Block Design

The experiment was conducted to find out the effect of plant spacing on the performance of rice variety IR-64 and IR64-Sub1 under conventional and Submerged condition at the National Rice Research Institute (NRRI), Cuttack, Odisha during the Rabi season of 2018. Different planting densities were maintained using different spacing's. These include (S1) 15 cm × 10 cm, (S2) 15 cm × 20 cm. The experiment was laid out in a randomized complete block design with 3 replications spacing of 15 cm × 10 cm with produced the highest grain yield of 350 gm-2 in submerged condition on IR64-Sub1 rice cultivar, which was significantly higher than the yield with recommended density (15 cm × 10 cm with IR64 Sub1). This yield was increased due to higher number of panicles m-2. This result suggests that higher planting density (15 cm×10 cm) rather than increased number of seedling hill-1 is necessary for getting higher yield of IR-64Sub1 rice cultivar in continuous submerged condition (where V1=IR 64, V2=IR-64 Sub1, S1=15 cm×10 cm, S2=20 cm×15 cm).

Effect of Different Irrigation Sources on Growth, Yield and Heavy Metals Accumulation in Tomato and Okra

2019 ◽  
pp. 10-19 ◽  
Author(s):  
Safina Naz ◽  
Muhammad Akbar Anjum ◽  
Sakeena Tul Ain Haider
Keyword(s):  
Heavy Metals ◽  
Field Experiments ◽  
Plant Biomass ◽  
Fruit Size ◽  
Growth Yield ◽  
Sewage Water ◽  
Growth And Yield ◽  
Well Water ◽  
Tube Well ◽  
Edible Parts

Field experiments were conducted to investigate the effects of different irrigation sources (canal, tube-well and sewage) on growth, yield and heavy metal uptake of two summer vegetables i.e. tomato and okra. Growth attributes (plant height, number of leaves, relative leaf chlorophyll content and leaf area) and yield components (number of fruits / pods per plant and fruit size) of okra and tomato were significantly increased with sewage water application. Lesser growth and yield of the studied vegetables was recorded with tube-well water. Use of sewage water improved total yields and fresh and dry plant biomass production of both the vegetables. Significantly higher and lower lead (Pb), copper (Cu), cadmium (Cd), nickel (Ni), chromium (Cr) and iron (Fe) contents were recorded in edible parts of the sewage and tube-well water irrigated vegetables, respectively. Edible parts (tomato fruits and okra pods) of the sewage water irrigated vegetables exhibited heavy metals contents above the maximum permissible limits. Leaf and root samples of the sewage water irrigated tomato and okra also contained significantly greater metals contents as compared to those irrigated with canal and tube-well water. It is concluded that vegetables irrigated with sewage water produced greater yields but these were found contaminated with heavy metals.

scholarly journals PENGARUH JARAK TANAM DAN MULSA TERHADAP PERTUMBUHAN DAN HASIL TANAMAN TOMAT (Lycopersicon esculentum Mill) PADA MUSIM PENGHUJAN

2018 ◽  
Vol 11 (2) ◽  
pp. 1-9
Author(s):  
Amelia Nur Suprianto ◽  
Tri Kurniastuti
Keyword(s):  
Plant Height ◽  
Block Design ◽  
Fruit Weight ◽  
Growth And Yield ◽  
Plant Spacing ◽  
Plastic Mulch ◽  
Tomato Plants ◽  
Straw Mulch ◽  
Randomized Block Design ◽  
Number Of Branches

This research aims 1) To determine the effect of interaction of different plant spacing and the provision of mulch to growth and yield of tomato plants. 2) To know the different spacing affect the growth and yield of tomato plants. 3) To know the use of mulch type effect on growth and yield of tomato plants. This research was conducted by using Randomized Block Design in Factorial (RAK) with 2 factors, first factor is plant spacing (J) consisting of 3 levels ie 40x30 cm (J1), 40x50 cm (J2), 40x70 cm (J3) . The second factor is mulch (M) consisting of 3 levels ie: without mulch (M0 / control), straw mulch (M1), plastic mulch (M2). The variables observed were plant height, number of branches, number of bunches, number of fruit, and fruit weight. Data were analyzed by using variance analysis (Anova), 5% level. The results showed that: There was no interaction between plant spacing and mulch on growth and yield of tomato plants. Treatment spacing 40x50 (J2) effect on the number of bunches of 35 HST, the weight of the first harvest fruit and total fruit weight. The use of straw mulch type (M1) has an effect on plant height, number of branches, number of 35 HST bunches, and total fruit weight.

scholarly journals Estimating Apple Fruit Size Distribution from Early-season Fruit Diameter Measurements

HortScience ◽  
2019 ◽  
Vol 54 (11) ◽  
pp. 1947-1954
Author(s):  
Richard P. Marini ◽  
James R. Schupp ◽  
Tara Auxt Baugher ◽  
Robert Crassweller
Keyword(s):  
Size Distribution ◽  
Fruit Size ◽  
Apple Fruit ◽  
Fruit Weight ◽  
Regression Equations ◽  
Full Bloom ◽  
Actual Distribution ◽  
Early Season ◽  
Large Size ◽  
Fruit Diameter

In three experiments, diameters of apples representing 7% to 30% of the fruit on a tree were measured at ≈60 days after full bloom. Using previously published regression equations, the early-season fruit diameter values were used to estimate apple fruit weight at harvest (FWH). At harvest, all fruit on sample trees were weighed and the distributions of estimated FWH for fruit measured early in the season were compared with distributions of the actual FWH for whole trees. Actual FWH was normally distributed for only one of the three experiments. Although the estimated mean FWH averaged for the 10 trees was within 9% of the actual mean FWH for all three experiments, the distribution of estimated FWH differed significantly from the actual distribution for all three experiments. All fruit were then assigned to appropriate commercial fruit sizes or box counts (number of fruit/19.05 kg). Fruit size tended to peak on the same four box counts for the estimated and actual populations, but the estimated populations had too few fruits in the small- and large-size box counts. Using early-season estimates of FWH, commercial apple growers and packers can predict fairly accurately the percentage of the crop that will fall into the peak box counts, but a more accurate early-season estimate of the fruit size distribution will likely require measuring 50% of the fruit on a tree.

scholarly journals Predicted Crop Value for Nectarines and Cling Peaches of Different Harvest Season as a Function of Crop Load

HortScience ◽  
2007 ◽  
Vol 42 (2) ◽  
pp. 239-245 ◽  
Author(s):  
Gabino H. Reginato ◽  
Víctor García de Cortázar ◽  
Terence L. Robinson
Keyword(s):  
Size Distribution ◽  
Field Experiments ◽  
Fruit Size ◽  
Tree Size ◽  
Crop Load ◽  
Early Season ◽  
Yield Efficiency ◽  
Late Season ◽  
Wide Range ◽  
Fruit Load

Several field experiments to assess the effect of tree size and crop load on fruit size and yield efficiency were conducted in cling peach and nectarine orchards of different harvest seasons in Chile. Trees were randomly selected in each orchard and then hand-thinned at the beginning of pit hardening to a wide range of crop loads. The fraction of above-canopy photosynthetically active radiation (PAR) intercepted by the canopy (PAR i) was determined at harvest. All fruits were counted and weighed and average fruit weight calculated. Crop load and yield were normalized by tree size measured by intercepted PAR i. For each orchard, the relationship between crop load and fruit size or crop load and yield efficiency was assessed by regression analysis. Fruit size distribution was calculated from fruit size adjusted for fruit load assuming a normal fruit size distribution and valued according to shipment date and price obtained from a Chilean export company. Using crop load as a covariate, fruit size adjusted for crop load was compared for nectarine and peach cultivars. Fruit size adjusted for fruit load and yield efficiency was greater with late season cultivars than the early or midseason cultivars. Predicted crop value (PCV), normalized in terms of PAR intercepted, was calculated for all the cultivars. Large differences in predicted crop value were found for early, midseason, and late ripening nectarines. Early and late ripening cultivars had the highest predicted crop value, especially at lower crop loads and larger fruit sizes. The early season cultivars had high crop value as a result of higher fruit prices, whereas the late season cultivar had high crop value as a result of higher production. With cling peaches, the early season cultivar ‘Jungerman’ had a lower predicted crop value than the late season cultivars ‘Ross’ and ‘Davis’. For cling peaches, the highest PCV was achieved at a relatively high crop load with high yield and small fruit size.

Sign in / Sign up

Export Citation Format

Share Document