scholarly journals Modification of Rubber (Hevea brasiliensis Muell. Arg.) Spacing for Long-term Intercropping

2019 ◽  
Vol 6 (01) ◽  
pp. 50-59
Author(s):  
Sahuri Sahuri ◽  
Andi Nur Cahyo ◽  
Risal Ardika ◽  
Iman Satra Nugraha ◽  
Aprizal Alamsyah ◽  
...  
Keyword(s):  
Upland Rice ◽  
Rubber Tree ◽  
Spatial Arrangement ◽  
Cost Ratio ◽  
Rubber Plantation ◽  
Double Row ◽  
Planting Pattern ◽  
Tree Population ◽  
Latex Yield

Low prices of rubber has been a serious problem to rubber growers in Indonesia. Rubber-based intercropping systems offers a practical solution to this issue and increasing overall productivity, for example by growing upland rice and maize between the rubber tree rows. This study was aimed to determine the suitable spacing in rubber planting to facilitate long-term rubber-based intercropping systems. A field experiment was established in a smallholder rubber plantation in the Tanah Laut Regency, South Kalimantan with area of 50 ha. Two planting patterns of rubber clone PB260 were tested: (1) single row planting pattern (SR) by 6 m x 3 m, and (2) double row planting pattern (DR) by 18 m x 2 m x 2.5 m. The experiment showed that the girth of the rubber trees with the SR system at the 1st tapping year was slightly larger than that in the DR system, even though statistically it was not signifi cant. The latex yield per tree of SR and DR systems were similar, however, latex yield per hectare of SR system was higher than the DR system due to a higher tree population in the SR system. The DR system was technically suitable for long term intercropping, because when the rubber tree reached 8 to 9-year-old, the light penetration was > 80% at distance of about 4 m from the rubber tree rows. Economically, DR system can increase the added values for rubber farmers because it allows long term intercropping. Rubber-based intercropping with DR system is suitable to be applied, especially by smallholders, with a marginal benefi t cost ratio of around 2.07. Keywords: Hevea, intercropping system, rubber planting pattern, spatial arrangement

scholarly journals A review: The development of double row spacing to improve land productivity and income of rubber smallholders

2021 ◽  
Vol 305 ◽  
pp. 03002
Author(s):  
Sahuri ◽  
Risal Ardika ◽  
Radite Tistama ◽  
Fetrina Oktavia
Keyword(s):  
Upland Rice ◽  
Rubber Tree ◽  
Rubber Plantation ◽  
Land Productivity ◽  
Double Row ◽  
Planting Pattern ◽  
Tree Population ◽  
Long Term Impact ◽  
Latex Yield

Low prices of rubber has been a serious problem to rubber smallholders in Indonesia. Rubber-based intercropping systems offers a practical solution to this issue and increasing overall productivity of intercrops, for example upland rice and maize. This study reviewed the suitable spatial arrangements in rubber planting to long term impact based intercropping systems. A field experiment was established in a smallholder rubber plantation in Tanah Laut Regency, South Kalimantan with area of 50 ha. Two planting patterns of rubber PB 260 clone were tested: (1) single row planting pattern (SR) by 6 m x 3 m, and (2) double row planting pattern (DR) by 18 m x 2 m x 2.5 m. The experiment showed that girth of rubber trees in the SR system at the first tapping year was slightly larger than in DR system, even though statistically it was not significant. The latex yield per tree of SR and DR systems were similar, however, latex yield per hectare of SR system was higher than DR system due to a higher tree population in SR system. The DR system was technically suitable for long term intercropping, because when rubber tree can reached 8 to 9 years old and light penetration was more than 80% at distance from the rubber row. The total area required for rubber, upland rice and maize grown in monoculture to produce an equivalent of a one hectare of rubber-upland rice-maize intercrop is 1.87. This means the intercropping has an advantage compared to monoculture.

scholarly journals Effect of high-frequency tapping system on latex yield, tapping panel dryness, and biochemistry of young hillside tapping rubber

2020 ◽  
Vol 48 (4) ◽  
pp. 2359-2367
Author(s):  
Raweerat RUKKHUN ◽  
Kesinee IAMSAARD ◽  
Sayan SDOODEE ◽  
Nipon MAWAN ◽  
Nuttapon KHONGDEE
Keyword(s):  
High Frequency ◽  
Rubber Tree ◽  
Dry Weight ◽  
Inorganic Phosphorus ◽  
Rubber Plantation ◽  
Rubber Plantations ◽  
Yield Production ◽  
Highly Correlated ◽  
Tapping Panel Dryness ◽  
Latex Yield

The objective of this study was to examine the effect of high-frequency tapping system (1/3S 3d/4) on latex yield, biochemistry and its impact on the Tapping Panel Dryness (TPD) of young RRIM600 hillside tapping rubber. The experiment was conducted at three different hillside rubber plantations (NM 1 - 3) at Na-Mom district, Song Khla province, Thailand. Eight-year-old rubber RRIM 600 clones was used in the experiment starting from 2008 until 2009. The rubber trees were investigated for latex yield production, bark consumption, and TPD. In addition, latex diagnosis (sucrose, inorganic phosphorus (Pi), and thiol levels) was measured. The results demonstrated that high-frequency tapping system positively affected the rubber latex yield formation. However, site-specific condition of rubber plantation altered latex yield production. NM 3 provided the highest latex yield (fresh and dry weight) as compared to other plantations. Tapping frequency was highly correlated to latex yield (fresh and dry weights) in all investigated rubber plantations (R2 > 0.75). Using high-frequency tapping system increased bark consumption and stimulated TPD. Moreover, results of latex diagnosis (sucrose, Pi, and thiol levels) showed relatively unhealthy rubber tree as impacted by high-frequency tapping system. Therefore, the farmer should consider it for better decision-making for tapping system application.

scholarly journals Intercropping the Sharp-Leaf Galangal with the Rubber Tree Exhibits Weak Belowground Competition

Forests ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 924
Author(s):  
Junen Wu ◽  
Huanhuan Zeng ◽  
Chunfeng Chen ◽  
Wenjie Liu ◽  
Xiaojin Jiang
Keyword(s):  
Rubber Tree ◽  
Nutrient Status ◽  
Agroforestry System ◽  
Agroforestry Systems ◽  
Tree Planting ◽  
Rubber Plantation ◽  
Belowground Competition ◽  
Soil P ◽  
Use Efficiency

Intercropping the sharp-leaf galangal with the rubber tree could help to improve the sustainability of the rubber tree planting industry. However, our understanding of belowground competition in such agroforestry systems is still limited. Therefore, we used stable isotope methods (i.e., water δ2H and δ18O and leaf δ13C) to investigate plant water-absorbing patterns and water use efficiency (WUE) in a monocultural rubber plantation and in an agroforestry system of rubber trees and sharp-leaf galangal. We also measured leaf carbon (C), nitrogen (N), and phosphorus (P) to evaluate the belowground competition effects on plant nutrient absorption status. Through a Bayesian mixing model, we found that the monocultural rubber trees and the intercropped sharp-leaf galangal absorbed much more surface soil water at a depth of 0–5 cm, while the rubber trees in the agroforestry system absorbed more water from the shallow and middle soil layers at a depth of 5–30 cm. This phenomenon verified the occurrence of plant hydrologic niche segregation, whereas the WUE of rubber trees in this agroforestry system suggested that the competition for water was weak. In addition, the negative correlation between the leaf P concentration of the rubber trees and that of the sharp-leaf galangal demonstrated their competition for soil P resources, but this competition had no obvious effects on the leaf nutrient status of the rubber trees. Therefore, this study verified that the belowground competition between rubber trees and sharp-leaf galangal is weak, and this weak competition may benefit their long-term intercropping.

scholarly journals Maximizing the Benefit-Cost Ratio of Anthracyclines in Metastatic Breast Cancer: Case Report of a Patient with a Complete Response to High-Dose Doxorubicin

2016 ◽  
Vol 9 (3) ◽  
pp. 840-846 ◽  
Author(s):  
Kevin Shee ◽  
Alan T. Kono ◽  
Susan P. D'Anna ◽  
Mark A. Seltzer ◽  
Xiaoying Lu ◽  
...  
Keyword(s):  
Metastatic Breast ◽  
Breast Cancer Case ◽  
Complete Response ◽  
Cancer Case ◽  
Cost Ratio ◽  
High Dose ◽  
Benefit Cost Ratio ◽  
Benefit Cost

Despite the clinical efficacy of anthracycline agents such as doxorubicin, dose-limiting cardiac toxicities significantly limit their long-term use. Here, we present the case of a 33-year-old female patient with extensive metastatic ER+/PR+/HER2– mucinous adenocarcinoma of the breast, who was started on doxorubicin/cyclophosphamide therapy after progressing on paclitaxel and ovarian suppressor goserelin with aromatase inhibitor exemestane. The patient was comanaged by cardiology, who carefully monitored measures of cardiac function, including EKGs, serial echocardiograms, and profiling of lipids, troponin, and pro-BNP every 2 months. The patient was treated with the cardioprotective agent dexrazoxane, and changes in cardiac markers [e.g. decreases in ejection fraction (EF)] were immediately addressed by therapeutic intervention with the ACE inhibitor lisinopril and beta-blocker metoprolol. The patient had a complete response to doxorubicin therapy, with a cumulative dose of 1,350 mg/m2, which is significantly above the recommended limits, and to our knowledge, the highest dose reported in literature. Two and a half years after the last doxorubicin cycle, the patient is asymptomatic with no cardiotoxicity and an excellent quality of life. This case highlights the importance of careful monitoring and management of doxorubicin-mediated cardiotoxicity, and that higher cumulative doses of anthracyclines can be considered in patients with ongoing clinical benefit.

scholarly journals Nutrient cycling in a RRIM 600 clone rubber plantation

2003 ◽  
Vol 60 (2) ◽  
pp. 353-357 ◽  
Author(s):  
Marcos Roberto Murbach ◽  
Antonio Enedi Boaretto ◽  
Takashi Muraoka ◽  
Euclides Caxambu Alexandrino de Souza
Keyword(s):  
Nutrient Cycling ◽  
Rubber Tree ◽  
Nutrient Content ◽  
Nutrient Loss ◽  
Tree Plantations ◽  
Rubber Plantation ◽  
Rubber Latex ◽  
Nutrient Retranslocation ◽  
One Year ◽  
K Fertilization

Few reports have been presented on nutrient cycling in rubber tree plantations (Hevea brasiliensis Muell. Arg.). This experiment was carried out to evaluate: the effect of K rates on the amount of nutrients transfered to the soil in a 13-year old Hevea brasilensis RRIM 600 clone plantation, nutrient retranslocation from the leaves before falling to the soil, and nutrient loss by dry rubber export. The experiment started in 1998 and potassium was applied at the rates of 0, 40, 80 and 160 kg ha-1 of K2O under the crowns of 40 rubber trees of each plot. Literfall collectors, five per plot, were randomly distributed within the plots under the trees. The accumulated literfall was collected monthly during one year. The coagulated rubber latex from each plot was weighed, and samples were analyzed for nutrient content. Increasing K fertilization rates also increased the K content in leaf literfall. Calcium and N were the most recycled leaf nutrients to the soil via litterfall. Potassium, followed by P were the nutrients with the highest retranslocation rates. Potassium was the most exported nutrient by the harvested rubber, and this amount was higher than that transfered to the soil by the leaf literfall.

scholarly journals QTL detection for growth and latex production in a full-sib rubber tree population cultivated under suboptimal climate conditions

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
João Ricardo Bachega Feijó Rosa ◽  
Camila Campos Mantello ◽  
Dominique Garcia ◽  
Lívia Moura de Souza ◽  
Carla Cristina da Silva ◽  
...  
Keyword(s):  
Rubber Tree ◽  
Qtl Detection ◽  
Climate Conditions ◽  
Tree Population ◽  
Latex Production

scholarly journals Neighbors consistently influence growth and survival in a frequently burned savanna

2021 ◽  
Author(s):  
Mark Davis ◽  
Richard Condit
Keyword(s):  
Significant Role ◽  
Spatial Arrangement ◽  
Landscape Dynamics ◽  
Positive Interactions ◽  
Successful Management ◽  
Growth And Survival ◽  
Long Term Studies ◽  
Large Grid

Successful management of savannas is challenging and requires knowledge of the causes and consequences of the spatial arrangement of the trees. In savannas, trees are often aggregated, and the ability of trees within the clumps to survive fires plays a significant role in determining the savannas landscape dynamics. Whether or not a tree survives a fire is often dependent on the nature of their interactions with neighboring trees, positive or negative. In cases where disturbances are episodic, detecting these interactions is only going to be possible through long-term studies. Data reported here, from twenty-five years of annual tree censusing of a large grid-plot in a frequently burned savanna, showed consistent neighbor facilitated survival, irrespective as to whether the neighbors were conspecifics or heterospecifics. The positive interactions likely involve the reduction of both herbaceous and woody fuel in denser sites, and possibly mycorrhizal sharing among nearby trees.

scholarly journals POLA PENGUSAHAAN KOMODITAS TANAMAN PANGAN PADA LAHAN KERING DITINJAU DARI PENERAPAN POLA TANAM DI KABUPATEN MOROWALI PROVINSI SULAWESI TENGAH

2013 ◽  
Vol 3 (3) ◽  
Author(s):  
Hasmari Noer
Keyword(s):  
Random Sampling ◽  
Upland Rice ◽  
Sampling Technique ◽  
Survey Method ◽  
Food Crops ◽  
Cropping Pattern ◽  
Planting Pattern ◽  
Dry Land ◽  
Cropping Patterns ◽  
Central Sulawesi

AbstrakPenelitian ini dilakukan untuk mengetahui pola pengusahaan komoditas tanaman pangan pada lahan kering ditinjau dari penerapan pola tanam di Kabupaten Morowali Provinsi Sulawesi Tengah. Metode penelitian yang digunakan adalah metode survey. Lokasi penelitian adalah di Kabupaten Morowali Provinsi Sulawesi Tengah. Teknik penarikan sampel digunakan random sampling. Sampel penelitian berjumlah 120 responden yang tersebar di 3 kecamatan yakni Kecamatan Bungku Utara, Kecamatan Petasia dan Kecamatan Mori Atas Kabupaten Morowali Provinsi Sulawesi Tengah. Pengumpulan data melalui wawancara dengan menggunakan kuesioner dan observasi. Hasil dari analisis pola pengusahaan komoditas tanaman pangan pada lahan kering ditinjau dari pola tanam di Kabupaten Morowali Provinsi Sulawesi Tengah.akan diuraikan secara deskriptif. Hasil penelitian ini didapatkan pola pengusahaan komoditas tanaman pangan pada lahan kering ditinjau dari pola tanam adalah petani melakukan pola pertanaman sejenis, yaitu padi-padi-palawija, jagung-jagung-palawija, kedele-kedele-sayuran dan kacang-kacang-bera. Pola Tanam II petani melakukan pola tanam padi gogo-jagung-sayuran dan Pola Tanam III padi gogo-kedele-bera.Kata kunci : Tanaman pangan, lahan kering, pola tanamAbstractThe study was conducted to determine the pattern of utilization of food crops on dry land cropping patterns in terms of the application of Morowali district of Central Sulawesi  province. The method used is a survey method. The research location is in Central Sulawesi province Morowali. The sampling technique used random sampling. Study sample were 120 respondents spread across three districts namely North Bungku District, District and Sub Mori Petasia Top Morowali Central Sulawesi province. Data collection through interviews using questionnaires and observation. The results of the analysis of patterns of food crops cultivation in dryland cropping pattern in terms of Sulawesi  Morowali Tengah.akan described descriptively. The results of this research, the pattern of utilization of food crops in terms of dryland cropping farmers cropping patterns are similar, the ricepaddy-pulses, corn-crops-corn, soy and vegetable-soy-bean-bean-fallow. Cropping Patterns II farmers cropping upland ricemaize-vegetables and planting pattern III upland rice-soybean-fallow.Keywords: food crops, dryland cropping

scholarly journals A Comparison of the Economic Efficiency of Living and Artificial Snowfence Designs for Road Protection

2000 ◽  
Vol 15 (2) ◽  
pp. 70-74 ◽  
Author(s):  
William Daigneault ◽  
David R. Betters
Keyword(s):  
Economic Performance ◽  
Performance Indicators ◽  
Performance Indicator ◽  
Cost Ratio ◽  
Double Row ◽  
Benefit Cost Ratio ◽  
Drifting Snow ◽  
Study Results ◽  
Benefit Cost

Abstract Both artificial and living snowfences are used to protect roads from blowing and drifting snow. This article evaluates and compares the economic performance of three snowfence designs--the Wyoming and double-row slatted artificial snowfences and a three-row living snowfence. The economic analysis evaluates the snowfences by applying four economic performance indicators: total net benefits, present net value, benefit/cost ratio, and annual breakeven benefits. The study uses snow removal savings and accident reduction benefit information from a case study in the state of Wyoming. The case study results show all the designs are economically efficient when used for road protection. However, the living snowfence outperformed the other designs in three of the four economic performance indicator categories. The largest proportion of total costs of the Wyoming and living snowfence are establishment costs whereas the bulk of total cost of the double-row slatted snowfence is for maintenance. The economic performance of all the snowfences is most sensitive to changes in their useful or effective lives. The procedures and general conclusions of the study can be applied to similar cases elsewhere. West. J. Appl. For. 15(2):70-74.

Weed and Disease Responses to Herbicides in Single- and Double-Row Cotton (Gossypium hirsutum)

Weed Science ◽  
1979 ◽  
Vol 27 (4) ◽  
pp. 444-449 ◽  
Author(s):  
J. H. Miller ◽  
C. H. Carter ◽  
R. H. Garber ◽  
J. E. DeVay
Keyword(s):  
Gossypium Hirsutum ◽  
Weed Control ◽  
Pythium Ultimum ◽  
Thielaviopsis Basicola ◽  
Annual Grass ◽  
Double Row ◽  
Planting Pattern ◽  
Single Row ◽  
Cotton Plants ◽  
Annual Weeds

For 3 yr, herbicide treatments of preplant trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine), postemergence diuron [3-(3,4-dichlorophenyl)-1,1-dimethylurea], both herbicides, or none were superimposed on cotton (Gossypium hirsutumL. ‘Acala SJ-2′) grown on beds centered at 102 cm using a single row or two rows spaced 28 cm apart. Cotton stand, after thinning, was 5.1 plants/m in each cotton row. Herbicides controlled annual weeds regardless of planting pattern. Cultivation, without herbicides, controlled annual grass weeds much better in cotton grown in single rows than in double rows. Preplant applications of trifluralin did not influence populations of cotton plants, regardless of row pattern. Single- and double-row plots treated with trifluralin always yielded more than untreated double rows. In two of three seasons, however, single-row plots without herbicides yielded as much as those treated with trifluralin. The lower yields in the double-row cotton were associated with reduced annual grass control especially in plots not treated with trifluralin. Weed control treatments or planting patterns did not influence the occurrence ofPythium ultimumTrow orRhizoctonia solaniKühn on cotton seedlings. The presence ofThielaviopsis basicola(Berk & Br.) Ferr. on cotton seedlings was not influenced by planting pattern but was increased by trifluralin in the third year of the study. Percentage of cotton plants with symptoms of verticillium wilt (Verticillium dahliaeKleb.) was not influenced by weed control treatments, but the percentage of diseased plants was higher in single-row than in double-row planting patterns. We attribute this response to fewer plants per hectare in single rows compared to double rows.

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