Determination of optimal replanting cycles for sugarcane production in Sri Lanka

Keerthipala, A. P.; Dharmawardene, N.

doi:10.1007/bf02945751

Cited by 9 publications

(5 citation statements)

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“…MacLellan and Carleton, 2003) and in temperate zone forests (Fiedler, 1990). Moreover, a similar declining productivity is observed in agriculture plantations with perennials such as sugarcane (Keertipala and Dharmawardene, 2000).…”

Section: The Site Productivity Problemmentioning

confidence: 93%

Economic analysis of exploitation and regeneration in plantations with problematic site productivity

Halbritter¹,

Deegen

2011

JFE

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Section: The Site Productivity Problemmentioning

confidence: 93%

Economic analysis of exploitation and regeneration in plantations with problematic site productivity

Halbritter¹,

Deegen

2011

JFE

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“…Thus, the regrowth rate of 75% may be a criterion for sustainable production of perennial rice. As with sugarcane 30 , these rst cultivars of perennial rice may need to be re-sown after about 8 growth cycles.…”

Section: Performance and Adoptionmentioning

confidence: 99%

Perennial rice improves farmer livelihood and ecosystem security

Zhang

Huang

et al. 2022

Preprint

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To tackle food insecurity faced by an ever-growing population, there is an urgent need to develop new forms of highly productive and ecologically-secure agricultural systems. Crop perennialization provides a novel and promising solution to both food security and environmental challenges. Compared with annual grain production systems, which often undermine basic ecosystem services, perennial crops could maintain important ecosystem functions and reduce agricultural inputs. Here, we report our successful breeding of perennial rice (PR) taking over 20 years. We introduced perennial growth into domesticated Asian rice by interspecific hybridization and subsequently developed several perennial cultivars that have been commercialized recently in China and successfully trialed in multiple countries. The perennial cultivars produce yields comparable to commercialized annual rice (AR) varieties and maintain them for 4-5 consecutive years from a single planting. They exhibit robust regrowth, acceptable grain and milling quality, and are strongly preferred by farmers. We also quantified the social-economic, ecological and soil benefits attributable to perennial rice cultivation. Finally, we estimated the geographical areas potentially suitable for perennial rice cultivation worldwide, based on the correlation between regrowth rate and over-winter temperatures. Our innovation would help maintain food security and ecological integrity, and also inspire research on other perennial grains.

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“…A detailed resolution obtained from photoelectric sensors allows a better way to decide which area has to be replanted in fields that were just planted or renovated if injuries compromise the crop economical threshold. Usually, sugarcane replanting is done based on yield drop (Keerthipala;Dharmawardene, 2000) and there is not much in the literature relating gaps and yield. Certainly, georeferencing gaps, their intensity and extension, and displaying them in a map, allows a useful tool, which can lead to better management by acquiring complementary information about the field, like problems related to erosion, pests and others, showing more precisely where to act, saving labour and time.…”

Section: Field Testsmentioning

confidence: 99%

Spatial variability of sugarcane row gaps: measurement and mapping

Molin

Veiga

2016

Ciênc. agrotec.

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Sugarcane is a very important crop in Brazil, used as food production and biofuel, providing 18% of the total primary energy in the country. An important requirement to high yield is a good uniformity in the sugarcane field, which is impaired due to row gaps that appear since the first year of sugarcane crop caused by planting failures, harvesting damages, machinery traffic, pests, diseases and others. The aim of this study is to develop a system based on a photoelectric sensor to scan the field, georeferencing gaps representing them as a map. A data logger integrates the data from the photoelectric sensors, an encoder and a Global Navigation Satellite System (GNSS) and measures the distance between plants, defining the gaps. Tests under controlled conditions, using regular obstacles simulating stalks, showed errors between 0.02 and 0.03 m under speeds varying from 1.3 to 3.0 m s -1 and obstacles ranging from 0.1 to 1.0 m of gap. Results of tests performed at sugar cane rows were close to manual measurement. Field tests were performed using sampling plots of 6.0 x 6.0 m (four crop rows) along the area, on newly planted and on ratoon areas, showed a good relation with manual measurements. The raw data provides the length of the individual gaps or its local percentage and the interpolation among punctual gaps produces a map highlighting areas with low and high gap intensity as a useful tool in the sugarcane management for decision making for local or integral replanting.Index terms: Close range remote sensing; interpolation; photoelectric sensor; biofuel; field quality. RESUMOA cana-de-açúcar é uma cultura muito importante para o Brasil, usada para a produção, tanto de alimentos, quanto de biocombustíveis, provendo 18% do total de energia primária no país. Um importante requisito para uma produtividade alta é uma boa uniformidade do canavial, a qual é comprometida devido a falhas que aparecem nas linhas de cana causadas por falhas no plantio, danos durante a colheita, tráfego de máquinas, pragas e doenças entre outros fatores. O objetivo deste estudo é desenvolver um sistema baseado em um sensor fotoelétrico para examinar o canavial, georreferenciando as falhas e apresentando-as em um mapa. Um coletor de dados integrou um sensor fotoelétrico, um encoder um Sistema de Navegação Global por Satélites (GNSS em inglês) mensurando a distância entre as plantas, definindo as falhas. Testes em situação controlada, utilizando estacas, mostraram erros entre 0,02 e 0,03 m variando a velocidade de 1,3 a 3,0 m s -1 e as estacas de 0,1 a 1,0 m de espaçamento, os resultados encontrados foram próximos aos mensurados manualmente.Testes em campo utilizando amostras de 6,0 x 6,0 m (quatro linhas de cana) em cana planta e soqueira, também mostraram uma boa relação com a mensuração manual. Os dados brutos fornecem o tamanho de cada falha individualmente ou em porcentagem e uma interpolação entre falhas pontuais produz um mapa que evidencia áreas com baixa ou alta densidade de falhas, criando uma ferramenta útil no gerenciamento...

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Determination of optimal replanting cycles for sugarcane production in Sri Lanka

Cited by 9 publications

References 0 publications

Economic analysis of exploitation and regeneration in plantations with problematic site productivity

Economic analysis of exploitation and regeneration in plantations with problematic site productivity

Perennial rice improves farmer livelihood and ecosystem security

Spatial variability of sugarcane row gaps: measurement and mapping

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