scholarly journals A Model for Phenological Development of Vietnamese Rice Influenced by Transplanting Shock

2004 ◽  
Vol 7 (1) ◽  
pp. 62-69 ◽  
Author(s):  
Akihiko Kotera ◽  
Eiji Nawata ◽  
Pham Van Chuong ◽  
Nguyen Ngoc Giao ◽  
Tetsu Sakuratani
Keyword(s):  
Transplanting Shock

scholarly journals Triacontanol Reduces Transplanting Shock in Machine-Transplanted Rice by Improving the Growth and Antioxidant Systems

2016 ◽  
Vol 7 ◽  
Author(s):  
Xiaochun Li ◽  
Qiuyi Zhong ◽  
Yuxiang Li ◽  
Ganghua Li ◽  
Yanfeng Ding ◽  
...  
Keyword(s):  
Antioxidant Systems ◽  
Transplanted Rice ◽  
Transplanting Shock

Effects of Seedling Age on Transplanting Shock, Growth and Yield of Pearl Millet (Pennisetum glaucum L.) Varieties in Semi-arid Zimbabwe

2006 ◽  
Vol 5 (2) ◽  
pp. 205-211 ◽  
Author(s):  
F.S. Murungu . ◽  
P. Nyamudeza . ◽  
F.T. Mugabe . ◽  
I. Matimati . ◽  
S. Mapfumo .
Keyword(s):  
Pearl Millet ◽  
Pennisetum Glaucum ◽  
Growth And Yield ◽  
Seedling Age ◽  
Transplanting Shock ◽  
Semi Arid

scholarly journals Influence of anthropogenic activities on the initial establishment and growth rate of introduced Senna siamea in Zomba-Malosa Forest Reserve, Malawi

2016 ◽  
Vol 1 (4) ◽  
Author(s):  
Gift Gladson Moyo ◽  
Marlene Chikuni
Keyword(s):  
Hot Spot ◽  
Anthropogenic Activities ◽  
Canopy Height ◽  
Base Diameter ◽  
Forest Reserve ◽  
Senna Siamea ◽  
Base Area ◽  
Total Height ◽  
Moisture Variation ◽  
Transplanting Shock

The study was conducted along the Nkanya-Lusewa rivers catchment as hot spot in Zomba-Malosa Forest Reserve  in Domasi area in Malawi to determine the influence of anthropogenic activities on the growth of Senna siamea planted by the community using  integrated indigenous-technocrat model. The study focused on 28 gardens along the rivers whose owners encroached the forest reserve and willed to participate in the study. In total we planted 101 S. siamea seedlings within a distance of 10 m on either side of the study rivers and we determined tree total height, canopy height, canopy base diameter and canopy base area in February, May, August, and November in 2014 using a ruler. We found that the average tree total height and canopy height slightly decreased from February to November  from initial 34.7 cm to 31.1 cm and 16.8 cm to 12.1 cm respectively due to impact of transplanting shock and bushfires which led to loss of tree tops and some branches but those of canopy base diameter and canopy base area increased slightly following sprouting of burnt seedling stems. We further found that tree growth rates varied among the gardens due to transplanting shock, post-planting care differences, soil moisture variation, and incidence of bushfires.

scholarly journals Physiological causes of transplantation shock on rice growth inhibition and delayed heading

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
HyeonSeok Lee ◽  
WoonHa Hwang ◽  
JaeHyeok Jeong ◽  
SeoYeong Yang ◽  
NamJin Jeong ◽  
...  
Keyword(s):  
Growth Inhibition ◽  
Rice Cultivation ◽  
Day Length ◽  
Root Damage ◽  
Inhibition Of Growth ◽  
Growth Space ◽  
Transplanting Shock ◽  
Growth Development ◽  
The Impact ◽  
Rice Phenology

AbstractTransplanting is an important rice cultivation method; however, transplanting shock commonly affects grain yield, and the mechanisms underlying the inhibition of growth, development, and delayed heading caused by transplanting shock have not yet been clearly elucidated. Here, we investigated the effects of seedling age, temperature, and root damage during transplanting on growth, development, and time to heading, both under artificially controlled and natural day length. Additionally, we investigated the impact of seedling root growth space and the potential mitigating effects of residual seed nutrients on young transplanted seedlings. The delay in heading in transplanted versus directly seeded plants was affected more by growth inhibition during the seedling period than by root damage during transplanting. However, root damage had an effect on the inhibition of leaf and tiller development, and the ratio of leaves to tillers increased because tiller development was inhibited more by transplanting shock compared with leaf development. Based on these findings, we propose factors reflecting the delay in growth due to transplanting shock that should be included for more accurate rice phenology modeling and suggest advantageous seeding conditions and transplanting methods for improved rice cultivation and yield in response to climate change.

scholarly journals Effects of Root Pruning on Germinated Pecan Seedlings

HortScience ◽  
2015 ◽  
Vol 50 (10) ◽  
pp. 1549-1552 ◽  
Author(s):  
Rui Zhang ◽  
Fang-Ren Peng ◽  
Pan Yan ◽  
Fan Cao ◽  
Zhuang-Zhuang Liu ◽  
...  
Keyword(s):  
Lateral Roots ◽  
Dry Weight ◽  
Root Systems ◽  
Root Pruning ◽  
Root Weight ◽  
Stem Height ◽  
Growth Season ◽  
Total Length ◽  
Transplanting Shock ◽  
Taproot Pruning

Root systems of pecan trees are usually dominated by a single taproot with few lateral roots, which are commonly thought to inhibit successful transplanting. This study aimed to evaluate early growth and root/shoot development of pecan seedlings in response to taproot pruning. Taproots of ‘Shaoxing’ seedling pecan trees were mildly (1/3 of the total length of the radicle removed) and severely (2/3 of the total length of the radicle removed) pruned at different seedling development stages shortly after germination. At the end of the first growing season, top growth was measured and then trees were uprooted so that root system regrowth could be evaluated. The results showed that root pruning had no impact on increases in stem height or stem diameter. However, pruning the taproot could stimulate primary growth in taproot branches. Root weight and the number of taproot branches per tree increased with decreasing taproot length. This study indicated that severe root pruning when three to five leaves had emerged resulted in root systems with more taproot branches and the greatest root dry weight after one growth season, which may increase survival and reduce transplanting shock.

Productions sous tunnel ou au champ: influence sur la survie de plants de chênes après plantation

1990 ◽  
Vol 66 (5) ◽  
pp. 494-497
Author(s):  
Michel Labrecque ◽  
Stevo Popovich
Keyword(s):  
Field Performance ◽  
Seedling Quality ◽  
Seedling Production ◽  
Greenhouse Condition ◽  
Quercus Macrocarpa ◽  
Species Survival ◽  
Transplanting Shock ◽  
Successful Establishment ◽  
Survival And Growth ◽  
Growth Of Seedlings

The use of polyethylene covered greenhouse has proven to be an effective method to promote the growth of seedlings. Could this improvement of the rate of growth affect seedling quality and their field performance after planting? To test this hypothesis, experimental plantations were made with two species of oak (Quercus macrocarpa Michx. and Q. rubra L.). Survival and growth in height after planting were compared between seedlings produced in one season under polyethylene or in two years in open field conditions. For both species, survival percentages of the greenhouse-cultivated stock were superior to those of the field-cultivated seedlings. Analysis of the variation of the survival percentages during weeks and months following outplantings leads us to believe that the field-cultivated seedlings are probably subjected to a greater transplanting shock. The production of large seedlings, in only one season under greenhouse condition, promotes the development of a more superficial root system. Root damage at lifting is less important and the chance of successful establishment after planting are improved. Key words: Greenhouse, plantation, Quercus sp., seedling production, seedling quality, survival.

PREDICTING NURSERY GROWTH AND TRANSPLANTING SHOCK IN RICE

2001 ◽  
Vol 37 (1) ◽  
pp. 65-81 ◽  
Author(s):  
MOIN U. SALAM ◽  
JAMES W. JONES ◽  
KAZUHIKO KOBAYASHI
Keyword(s):  
Seedling Growth ◽  
Growth Traits ◽  
Growth Models ◽  
Simulation Models ◽  
Rice Growth ◽  
Transplanted Rice ◽  
Shock Process ◽  
Independent Field ◽  
Crop Development ◽  
Transplanting Shock

Seedling growth in the nursery and the magnitude of shock experienced by the seedlings after transplanting can affect subsequent growth and development of transplanted rice (Oryza sativa). These two processes have not been adequately represented by rice growth simulation models. In this study, seedling growth in the nursery was described with respect to endosperm mobilization, dry matter (DM) distribution and seed size. In addition, the transplanting shock process was represented describing the crop development and growth in relation to seedling age at transplanting. These relationships, as two sub-models, were incorporated into CERES-Rice, a rice growth model, and their performances compared with independent field data. The nursery growth sub-model was also evaluated with another model, RIBHAB. Results of the comparison showed that the nursery growth sub-model, either with CERES-Rice or RIBHAB, closely predicted observed seedling growth. On the other hand, CERES-Rice overestimated root and leaf DM and underestimated culm DM, while RIBHAB underestimated all the growth traits considered in the evaluation. Transplanting shock period predicted by the sub-model closely mimicked observation, whereas CERES-Rice highly overestimated it. It is concluded that the developed nursery growth and transplanting shock sub-models can be incorporated into CERES-Rice and other rice growth models for better simulation of those growth processes.

scholarly journals Evaluation of Different Designs of Isolated Cells to Raise Single Rice Seedlings for SRI Mechanized Transplanting

2020 ◽  
Author(s):  
Mohd Amin Mohd. Soom ◽  
Azwan Awang ◽  
Mohamadu Boyie Jalloh
Keyword(s):  
Grid Cell ◽  
Rice Seedling ◽  
Paddy Fields ◽  
System Of Rice Intensification ◽  
Isolated Cells ◽  
Rice Intensification ◽  
Transplanting Shock ◽  
Square Cells ◽  
Paddy Farmers ◽  
Single Rice

Numerous benefits of the system of rice intensification (SRI) have been documented since SRI was popularized 30 years ago. To date, more than 58 rice growing countries are practicing SRI, covering around 4 million ha of paddy fields and involving more than 10 million farmers. Many paddy farmers shy away from practicing SRI due to  extreme labour endurance and number of labors required, especially during transplanting and frequent weeding. The manual transplanting technique to ensure proper root establishment of the seedlings, makes SRI less appealing to many paddy farmers. Furthermore, the transplanting shock is a problem arises from manual transplanting technique needs to be solved  that resulted to damaged roots causing  delays in crop establishment and reducing productivity. Mechanized transplanting of the young single seedlings into the paddy fields at a wider  plantation area  eliminates drudgery and enables better exposure to sunlight, water, air, and nutrients. This paper presents a solution to overcome the problem of transplanting shock and the  back-breaking manual transplanting, which was achieved by containing the roots of each seedling in a grid of isolated cells. Several designs of the isolated cells to contain the root system were fabricated and tested. These include using aluminum square cells, polyvinyl chloride pipe circular cells, biodegradable grid cells, biodegradable conical capsules, and germinated seeds sowed in a grid without isolated cells. The typical grid cell size was 15 mm by 15 mm with a depth of each cell varied from 40 mm to 60 mm. The most promising design was one with single seedlings raised in bio-degradable capsules arranged close together to fit the conventional rice seedling tray of 300 mm by 600 mm and can accommodate 684 capsules per tray. Upon reaching 2-3 leaf stage, the seedlings with undisturbed roots are ready to be transplanted into the paddy fields using the currently available rice transplante rs.

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