Predicting biomass of bilberry (Vaccinium myrtillus) using rank distribution and root-to-shoot ratio models

Plant Ecology ◽  
2021 ◽  
Author(s):  
P. Frolov ◽  
V. Shanin ◽  
E. Zubkova ◽  
M. Salemaa ◽  
R. Mäkipää ◽  
...  
Keyword(s):  
Vaccinium Myrtillus ◽  
Rank Distribution ◽  
Shoot Ratio ◽  
Root To Shoot Ratio

scholarly journals Influence of Atomization Nozzles and Spraying Intervals on Growth, Biomass Yield, and Nutrient Uptake of Butter-Head Lettuce under Aeroponics System

Agronomy ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 97
Author(s):  
Mazhar H. Tunio ◽  
Jianmin Gao ◽  
Imran A. Lakhiar ◽  
Kashif A. Solangi ◽  
Waqar A. Qureshi ◽  
...  
Keyword(s):  
Root Growth ◽  
Nutrient Uptake ◽  
Nutrient Solution ◽  
Biomass Yield ◽  
Chemical Properties ◽  
Cultivated Plants ◽  
Growth Ratio ◽  
Shoot Ratio ◽  
Droplet Sizes ◽  
Root To Shoot Ratio

The atomized nutrient solution droplet sizes and spraying intervals can impact the chemical properties of the nutrient solution, biomass yield, root-to-shoot ratio and nutrient uptake of aeroponically cultivated plants. In this study, four different nozzles having droplet sizes N1 = 11.24, N2 = 26.35, N3 = 17.38 and N4 = 4.89 µm were selected and misted at three nutrient solution spraying intervals of 30, 45 and 60 min, with a 5 min spraying time. The measured parameters were power of hydrogen (pH) and electrical conductivity (EC) values of the nutrient solution, shoot and root growth, ratio of roots to shoots (fresh and dry), biomass yield and nutrient uptake. The results indicated that the N1 presented significantly lower changes in chemical properties than those of N2, N3 and N4, resulting in stable lateral root growth and increased biomass yield. Also, the root-to-shoot ratio significantly increased with increasing spraying interval using N1 and N4 nozzles. The N1 nozzle also revealed a significant effect on the phosphorous, potassium and magnesium uptake by the plants misted at proposed nutrient solution spraying intervals. However, the ultrasonic nozzle showed a nonsignificant effect on all measured parameters with respect to spraying intervals. In the last, this research experiment validates the applicability of air-assisted nozzle (N1) misting at a 30-min spraying interval and 5 min of spraying time for the cultivation of butter-head lettuce in aeroponic systems.

Assessment of Biomass Expansion Factor (BEF) and Root-to-shoot Ratio (R) for some Tree Species of Uttarakhand, India

2014 ◽  
Vol 37 (4) ◽  
pp. 371-377
Author(s):  
Laxmi Rawat ◽  
Pramod Kumar ◽  
Nishita Giri
Keyword(s):  
Tree Species ◽  
Tectona Grandis ◽  
Expansion Factor ◽  
Pinus Roxburghii ◽  
Biomass Expansion Factor ◽  
Shorea Robusta ◽  
Shoot Ratio ◽  
Harvesting Method ◽  
Root To Shoot Ratio ◽  
Age Series

The present study was conducted in Shorea robusta (sal), Pinus roxburghii (Chir pine), Tectona grandis (Teak) and Ailanthus excelsa (Ardu) plantations of different ages at different sites in Uttarakhand. Biomass was calculated on the basis of complete tree harvesting method (stratified mean tree technique method). Biomass Expansion Factor (BEF) and root-to-shoot ratio (R) of all these 4 tree species have been calculated and presented in this paper. Sample trees of S. robusta were of 45, 53 and 60 years of age. BEF for all these 3 age series were assessed as 1.3 at 45 years, 1.4 at 53 years and 1.2 at 60 years of age. Similarly, R values were assessed as 0.27, 0.28 and 0.26, respectively, in these 3 age series. BEF and R values assessed for T. grandis (28 years age) as 1.46 and 0.21; and for A. excelsa (39 years age) as 1.23 and 0.23, respectively. BEF for P. roxburghii trees calculated as 2.3 for 13 years age, 1.75 for 20 years, 1.71 for 22 years, 1.5 for 33 years and 1.46 for trees of 45 years of age. Similarly, R values were 0.2 for 13 years, 0.21 for 20 years, 0.12 for 22 years, 0.13 for 33 years and 0.15 for 45 years of age. P. roxburghii sample trees have shown decreasing order of BEF with increasing age, whereas S. robusta has not shown such trend along the chronosequence.

scholarly journals Abiotic stress upregulated TaZFP34 represses the expression of type-B response regulator and SHY2 genes and enhances root to shoot ratio in wheat

Plant Science ◽  
2016 ◽  
Vol 252 ◽  
pp. 88-102 ◽  
Author(s):  
Hongping Chang ◽  
Dandan Chen ◽  
Jason Kam ◽  
Terese Richardson ◽  
Janneke Drenth ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Response Regulator ◽  
Type B ◽  
Shoot Ratio ◽  
Root To Shoot Ratio

The impact of light quality and quantity on root-to-shoot ratio and root carbon reserves in aspen seedling stock

New Forests ◽  
2015 ◽  
Vol 46 (4) ◽  
pp. 527-545 ◽  
Author(s):  
J. W. G. Kelly ◽  
S. M. Landhäusser ◽  
P. S. Chow
Keyword(s):  
Light Quality ◽  
Root Carbon ◽  
Shoot Ratio ◽  
Root To Shoot Ratio ◽  
The Impact

scholarly journals Pengaruh Dosis Pemupukan dengan Puktan Granul Terhadap Pertumbuhan dan Uji Kompatibilitas Bibit Tanaman Pangan dan Holtikultura

2017 ◽  
Vol 1 (2) ◽  
pp. 124
Author(s):  
Catur Rini Sulistyaningsih ◽  
Catur Budi Handayani
Keyword(s):  
Shoot Ratio ◽  
Root To Shoot Ratio

Penelitian ini bertujuan untuk menguji pupuk organik padat dalam bentuk granul terhadap pertumbuhan bibit tanaman uji (pepaya,kelengkeng, rambutan, jeruk, padi, sorgum dan sawi) dan mengetahui kompatibilitas akar bibit tanaman terhadap pupuk organik. Metode penelitian dibagi dalam 2 tahapan yaitu perkecambahan dan pembibitan. Hasil penelitian ini menunjukkan bahwa berdasarkan uji statistik terhadap hubungan antara pemberian dosis pemupukan terhadap tinggi dan jumlah helai daun pepaya, kelengkeng, rambutan, padi, sorgum, sawi, dan jeruk menunjukkan bahwa pemupukan menggunakan pupuk tani granul pada gradasi 20 gram, 30 gram, dan 40 gram tidak memiliki pengaruh yang signifikan terhadap tinggi tanaman dan jumlah helai daun. Untuk bobot tanaman baik bobot tanaman segar maupun kering tertinggi pada umumnya pada dosis pupuk 40 gram, kecuali tanaman sorgum tertinggi pada dosis 30 gram. Untuk root to shoot ratio tertinggi pada umumnya juga pada dosis pupuk 40 gram, kecuali pada tanaman sorgum tertinggi pada dosis pupuk40 gram, kecuali pada tanaman sorgum tertinggi pada dosis pupuk 20 gram. Uji kompatibilitas tertinggi pada dosis pupuk 40 gram pada tanaman padi, kelengkeng dan jeruk. Pada dosis 30 gram tertinggi pada tanaman rambutan, dan tertinggi pada dosis 20 gram pada tanaman pepaya dan sawi. Dan untuk tanaman sorgum baik pada dosis 20 gram, 30 gram dan 40 gram kolonisasi 0%.Kata Kunci : pupuk organik, kompatibilitas, bibit

scholarly journals Water Deficit and Recovery-Induced Changes in Growth, Photosynthetic Characteristics, Antioxidant Enzymes and Yield of Two Tartary Buckwheat Genotypes

2021 ◽  
Vol 25 (02) ◽  
pp. 483-491
Author(s):  
Yan Wan
Keyword(s):  
Water Content ◽  
Plant Height ◽  
Water Deficit ◽  
Tartary Buckwheat ◽  
Seed Number ◽  
Branch Number ◽  
Node Number ◽  
Stem Node ◽  
Shoot Ratio ◽  
Root To Shoot Ratio

Tartary buckwheat (Fagopyrum tataricum) is an important food crop that is widely adaptable to hostile environments. In this study the responses of two Tartary buckwheat genotypes: drought-susceptible Chuanqiao No. 1 (CQ) and drought-tolerant Jingqiao No. 2 (JQ) in terms of morphology, photosynthesis, physiology and yield to a progressive water deficit and recovery treatment (WD-R) were evaluated. Plants in the well-watered (WW) treatment were watered throughout the experiment. Compared to the WW treatment, water deficit in the WD-R treatment caused decreases in plant height, stem diameter, branch number, stem node number, biomass, seed number, soil water content (SWC), leaf relative water content (RWC), net photosynthesis rate (Pn), intercellular CO2 concentration, stomatal conductance (Gs), transpiration rate (Tr) and Fv/Fm in both CQ and JQ plants. Leaf wilting, malondialdehyde content, superoxide dismutase activity, peroxidase activity, initial fluorescence (F0) and root-to-shoot ratio were significantly increased under water stress in the WD-R treatment. Under the WD-R treatment, compared to CQ, JQ maintained higher RWC, SWC, Pn, Gs, WUE, Fv/Fm, plant height, branch number, stem node number, root biomass, stem biomass, leaf biomass, total biomass, root-to-shoot ratio, seed number per plant, and yield, but a lower Tr and F0. By correlation analysis, Gs was positively correlated with leaf RWC and SWC. These differential growth indexes, biochemical traits and physiological responses might be useful for understanding drought-tolerance genotypes that can grow under water-deficit conditions with minimum yield loss. © 2021 Friends Science Publishers

scholarly journals Response of Sophora secundiflora to Nitrogen Form and Rate

HortScience ◽  
2011 ◽  
Vol 46 (9) ◽  
pp. 1303-1307 ◽  
Author(s):  
Genhua Niu ◽  
Denise Rodriguez ◽  
Mengmeng Gu
Keyword(s):  
Dry Weight ◽  
Nitrogen Form ◽  
Shoot Height ◽  
Root Dry Weight ◽  
Shoot Dry Weight ◽  
Shoot Ratio ◽  
Significant Difference ◽  
Root To Shoot Ratio ◽  
Total Dry Weight ◽  
Mountain Laurel

Texas mountain laurel (Sophora secundiflora) is a native shrub tolerating drought, heat, windy conditions, and alkaline or wet soils. However, its availability is somewhat low and little information is available on nutrient requirement and other culture information. Two greenhouse experiments were conducted to quantify the responses of Texas mountain laurel to different forms and rates of nitrogen (N) fertilizer. In Expt. 1, 1-year old seedlings were treated for 194 days with three NO3:NH4 ratios at 25:75, 50:50, and 75:25 and two rates of N at 100 and 200 mg·L−1 in a factorial design. There was no interaction between the N rate and form on any growth parameters. Nitrogen form did not significantly affect shoot dry weight, root dry weight, root–to-shoot ratio, or the total dry weight. There was no significant difference between N rate of 100 and 200 mg·L−1 on root dry weight, root-to-shoot ratio, or the total dry weight. The shoot dry weight of Texas mountain laurel fertilized with 100 mg·L−1 was higher compared with that of the plants fertilized at 200 mg·L−1. The reduced shoot dry weight at N of 200 mg·L−1 was the result of the higher substrate salinity. In Expt. 2, seedlings were fertilized with five N rates (50, 100, 150, 200, and 250 mg·L−1) for 203 days. Plants watered with 150, 200, and 250 mg·L−1 were taller than those fertilized with 50 mg·L−1. The shoot height of plants watered with 100 mg·L−1 was only significantly different from 50 mg·L−1. For rapid growth of Texas mountain laurel, a N rate range of ≈150 mg·L−1 was recommended supplied with a combination of NO3-N and NH4-N in the ratios of 0.3 to 3.0.

Root to shoot ratio of crops as influenced by CO2

1995 ◽  
Vol 187 (2) ◽  
pp. 229-248 ◽  
Author(s):  
Hugo H. Rogers ◽  
Stephen A. Prior ◽  
G. Brett Runion ◽  
Robert J. Mitchell
Keyword(s):  
Shoot Ratio ◽  
Root To Shoot Ratio
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