Response of vegetative growth and fruit development to regulated deficit irrigation at different growth stages of pear-jujube tree

Greenhouse experiments were conducted in 2017 and 2018 to investigate quantitative relationships between tomato yield parameters and deficit irrigation at different growth stages. Tomato plants received one of three irrigation treatments (full irrigation, 2/3, and 1/3 full irrigation) at flowering and fruit development (stage 2) and at fruit maturation (stage 3); no deficit irrigation treatments were applied at stage 1 during either season. We used linear regression to investigate how well the yield parameters such as whole-plant yield (Y), single-fruit weight (y), fruit diameter (D), and length (L) were correlated with seasonal evapotranspiration (ET) under different deficit irrigation treatments. Six water–yield models (Blank, Jensen, Singh, Stewart, Minhas, and Rao models) were used to predict the tomato yield parameters with deficit irrigation at different growth stages. The results showed that deficit irrigation at each growth stage significantly decreased ET, Y, y, L, and D, but not T1 (2/3 full irrigation at flowering and fruit development). T1 produced higher water use efficiency (WUE) with no significant decrease in yield parameters, indicating that an acceptable balance between high WUE and yield can be obtained with an appropriate water deficit at stage 2. Relative Y, y, D, and L increased linearly as relative seasonal ET increased. Water deficit sensitivity indexes calculated by the six different water–yield models showed that Y, y, D, and L were more sensitive to water deficit at stage 2 than at stage 3. The values of Y calculated by the Minhas and Singh models were similar to the observed values. The Minhas model provided good estimates of L and D, and the Blank model is recommended for calculating y when there is a water deficit at different growth stages. The water–yield models can be used to optimize irrigation water management and provide a sound basis for efficient tomato production.

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Quantitative Analysis of Tomato Yield and Comprehensive Fruit Quality in Response to Deficit Irrigation at Different Growth Stages

HortScience ◽

10.21273/hortsci14180-19 ◽

2019 ◽

Vol 54 (8) ◽

pp. 1409-1417 ◽

Cited By ~ 3

Author(s):

Xuelian Jiang ◽

Yueling Zhao ◽

Ling Tong ◽

Rui Wang ◽

Sheng Zhao

Keyword(s):

Fruit Quality ◽

Linear Correlation ◽

Fruit Development ◽

Deficit Irrigation ◽

Development Stage ◽

Growth Stages ◽

Full Irrigation ◽

Tomato Yield ◽

Quality Indexes ◽

Different Growth Stages

To investigate the quantitative response of tomato yield and fruit quality to deficit irrigation applied at different growth stages, greenhouse experiments were conducted in 2017 and 2018. Three irrigation treatments (full irrigation and two-thirds or one-third of full irrigation) were applied to greenhouse-grown tomato plants at flowering and fruit development (stage 2) and at fruit maturation stage (stage 3). Grey relational analysis (GRA), the technique for order preference by similarity to an ideal solution (TOPSIS), and principal components analysis (PCA) were used to calculate the comprehensive fruit quality indexes, and combinatorial evaluation method was determined. The results showed that deficit irrigation significantly reduced evapotranspiration (ET) and tomato yield and that relative yield had a negative linear correlation with relative seasonal water deficit (1−ETi/ETc). However, deficit irrigation improved fruit quality, especially at stage 2. Total soluble solids, the total soluble sugar concentration, the sugar-to-acid ratio, and vitamin C in the tomatoes all increased significantly in plants that were deficit irrigated compared with fully irrigated plants, while organic acids and lycopene decreased in both years. There were linear correlations between fruit quality parameters and 1−ETi/ETc. The comprehensive quality index derived from GRA and PCA is reliable, and the comprehensive quality indexes given by GRA, PCA, and a combination of GRA and PCA showed positive linear correlation with 1−ETi/ETc. The comprehensive quality ranking showed that in both years, F2/3M1 (two-thirds full irrigation at stage 2) gave a better result and CK (full irrigation) the worst. An appropriate water deficit at the flowering and fruit development stage, which results in a trade-off between acceptable yield and improved fruit quality, is recommended. Our results provide a sound basis for tomato production that has a desirable balance between high yield and high fruit quality.

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Carbon Storage and Carbon Dioxide Sequestration of Banana Plants at Different Growth Stages

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1010-1012.662 ◽

2014 ◽

Vol 1010-1012 ◽

pp. 662-665

Author(s):

Mu Qiu Zhao ◽

Ming Li ◽

Yun Feng Shi

Keyword(s):

Carbon Dioxide ◽

Vegetative Growth ◽

Hainan Island ◽

Growth Stages ◽

Maturity Stage ◽

C Storage ◽

C Cycle ◽

Fruit Growing ◽

Storage Structures ◽

Different Growth Stages

Large annual herbaceous plants such as banana (Musa spp.) have a very impressive carbon (C) storage and carbon dioxide (CO2) sequestration in agroecosystems, and play a certain role in global C cycle, climate regulation and reducing global warming. In this paper, we systematically studied C storage on the different growth stages, CO2sequestration and distribution, and mathematical models for predicting CO2sequestration by bananas which were planted in western Hainan island, China. The results showed that C content of dry matter in different structures of banana plants was 45-50% in line with the current results, and in fruit reached the highest, in stems and roots followed, while that in leaves were the lowest. C storage in different structures of banana plants increased exponentially during banana growing process (vegetative growth and bud stage), stems were the major storage structures of C, and roots and leaves also had considerable C storage. C fixed by banana plants was mainly distributed in fruit at fruit growing stage. CO2sequestration was 16.3, 41.1 and 80.0t/ha at vegetative growth, bud and fruit maturity stage separately, and power function model can be applied with stem diameter (D) or composite parameter (D2H) as independent variables to predict.

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Nitrogen application modified the effect of deficit irrigation on tomato transpiration, and water use efficiency in different growth stages

Scientia Horticulturae ◽

10.1016/j.scienta.2019.109112 ◽

2020 ◽

Vol 263 ◽

pp. 109112

Author(s):

Huiping Zhou ◽

Shaozhong Kang ◽

Fusheng Li ◽

Taisheng Du ◽

Manoj K. Shukla ◽

...

Keyword(s):

Water Use Efficiency ◽

Water Use ◽

Deficit Irrigation ◽

Growth Stages ◽

Nitrogen Application ◽

Use Efficiency ◽

Different Growth Stages

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Irrigation of field peas (Pisum sativum): response to timing at different crop growth stages

The Journal of Agricultural Science ◽

10.1017/s0021859699006516 ◽

1999 ◽

Vol 132 (4) ◽

pp. 417-424 ◽

Cited By ~ 1

Author(s):

C. M. KNOTT

Keyword(s):

Pisum Sativum ◽

Vegetative Growth ◽

Growth Stage ◽

Crop Growth ◽

Yield Response ◽

Growth Stages ◽

Field Peas ◽

Crop Growth Stages ◽

Different Growth Stages

The response of two cultivars of dry harvest field peas (Pisum sativum), Solara and Bohatyr, to irrigation at different growth stages was studied on light soils overlying sand in Nottinghamshire, England in 1990, when the spring was particularly dry, in 1991 which had a dry spring and summer and in contrast, 1992, when rainfall was greater compared with the long-term (40 year) mean.Solara, short haulmed and semi-leafless was more sensitive to drought than the tall conventional-leaved cultivar Bohatyr and gave a greater yield response to irrigation, particularly at the vegetative growth stage in the first two dry years 1990 and 1991, of 108% and 55% respectively, compared with unirrigated plots. Bohatyr was less sensitive to the timing of single applications.In all years, peas irrigated throughout on several occasions produced the highest yields, but this was the least efficient use of water.

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Long-term Effects of Restricted Root Volume and Regulated Deficit Irrigation on Peach: I. Growth and Mineral Nutrition

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.125.1.135 ◽

2000 ◽

Vol 125 (1) ◽

pp. 135-142 ◽

Cited By ~ 28

Author(s):

A.M. Boland ◽

P.H. Jerie ◽

P.D. Mitchell ◽

I. Goodwin ◽

D.J. Connor

Keyword(s):

Mineral Nutrition ◽

Vegetative Growth ◽

Deficit Irrigation ◽

Prunus Persica ◽

Root Length Density ◽

Interactive Effects ◽

Long Term Effects ◽

Root Volume ◽

Regulated Deficit Irrigation ◽

Soil Volume

Individual and interactive effects of restricted root volume (RRV) and regulated deficit irrigation (RDI) on vegetative growth and mineral nutrition of peach trees [Prunus persica (L.) Batsch (Peach Group) `Golden Queen'] were studied over 3 years (1992-95). Trees were grown in lysimeters of five different volumes (0.025, 0.06, 0.15, 0.4, and 1.0 m3) with either full or deficit (RDI) irrigation. Increasing soil volume increased vegetative growth as measured by trunk cross-sectional area (TCA) (linear and quadratic, P < 0.011) and tree weight (linear, P < 0.001) with the final TCA ranging from 29.0 to 51.0 cm2 and tree weight ranging from 7.2 to 12.1 kg for the smallest to largest volumes. Root density measured at the completion of the experiment decreased with increasing soil volume (linear and quadratic, P < 0.001) with root length density declining from 24.0 to 2.0 cm·cm-3. RDI reduced vegetative growth by up to 70% as measured by weight of summer prunings. Root restriction was effective in controlling vegetative vigor and is a viable alternative for control of vegetative growth. Mineral nutrition did not limit tree growth.

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