Effect of water stress on growth and yield of Tenera oil palm.

Gawankar, M. S.; Devmore, J. P.; Jamadagni, B. M.; Sagvekar, V. V.; Khan, Hilal Musadiq

doi:10.37855/jah.2003.v05i01.10

Cited by 12 publications

(6 citation statements)

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“…In the current study, it was noticed that production of leaves was found non-significant with different cross combinations. Gawankar et al, (2003) in oil palm have recorded similar kind of observations earlier which were in accordance to the present investigation while working with irrigation levels in oil palm. Significantly highest number of fresh fruit bunches per palm was observed with 115D x 291P (8.5), whereas, 65D x 111P has recorded significantly lowest number of fresh fruit bunches (3.1) produced per palm per year.…”

Section: Resultssupporting

confidence: 92%

Analysis of Bunch Quality in Oil Palm Hybrid Cross Combinations under Krishna-Godavari Zone of Andhra Pradesh

Bhaskar¹,

Rao²

2018

Int.J.Curr.Microbiol.App.Sci

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Section: Resultssupporting

confidence: 92%

Analysis of Bunch Quality in Oil Palm Hybrid Cross Combinations under Krishna-Godavari Zone of Andhra Pradesh

Bhaskar¹,

Rao²

2018

Int.J.Curr.Microbiol.App.Sci

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“…Gen EgAGL2-1 diekspresikan selama tahap akhir p e r k e m b a n g a n b u n g a b e t i n a p a d a f a s e perkembangan organ reproduksi. Gen ini juga yang mempengaruhi sex ratio terdiri atas ketersediaan air (Nanik et al, 2020;Henson dan Harun, 2005;Jones, 1997;Ahmed et al, 2021;Harahap dan Lubis , 2018), panjang musim kemarau (Jazayeri et al, 2015;Gawankar et al, 2004;Ajambang et al, 2016;Corley, 1976), dan lama penyinaran (Abdullah et al, 2017;Shanmuganathan et al, 2014). Sedangkan secara genetik dipengaruhi oleh kandungan karbohidrat dalam jaringan tanaman (Ajambang et al, 2015) dan ekspresi gen MADs box ( Adam et al, 2006 ;Adam et al, 2007).…”

Section: Faktor Genetikunclassified

“…Selain itu, defisit air dapat menyebabkan aborsi pada bunga betina karena asimilat yang dibutuhkan untuk membentuk tandan tidak tercukupi (Md Noor et al, 2011;Kamil dan Omar, 2016). Gawankar et al, (2004) menyatakan bahwa sex ratio lebih tinggi pada musim kemarau dibandingkan musim hujan pada kelapa sawit jenis Tenera. Sejalan dengan Corley (1976) menyatakan bahwa peningkatan produksi bunga jantan pada musim hujan merupakan adaptasi terhadap penurunan kepadatan serbuk sari yang disebabkan oleh kelembaban ditemukan pada tahap pembentukan kelopak dan mahkota bunga jantan (Adam et al, 2007).…”

Section: Faktor Lingkunganunclassified

MENGENAL FENOMENA FEMININ PADA KELAPA SAWIT (Elaeis guineensis Jacq.)

Sitepu¹,

Yenni

Sujadi

2021

war

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Istilah kelapa sawit feminin mulai sering muncul di kalangan praktisi kelapa sawit. Istilah ini menjelaskan kondisi tanaman kelapa sawit yang lebih banyak memproduksi bunga betina dibandingkan bunga jantan dengan proporsi yang tidak seimbang pada kondisi lingkungan yang optimal. Fenomena ini diduga merupakan salah satu faktor yang menyebabkan produktivitas tanaman belum mampu mendekati potensi produksi varietas yang telah dirilis. Perbandingan antara jumlah bunga betina dengan seluruh bunga yang diproduksi (sex ratio) sangat penting untuk dipelajari terkait ketersediaan polen yang dibutuhkan untuk menyerbuki tandan bunga betina. Lingkungan dan genetik merupakan faktor yang dapat mempengaruhi sex ratio pada kelapa sawit, dan pembentukan fruit set kelapa sawit. Sex ratio pada enam varietas PPKS umur 8 tahun bervariasi mulai dari 53,2%-73,0%. Hal ini mengindikasikan bahwa polen yang dibutuhkan untuk menyerbuki tandan bunga betina tercukupi, sehingga dapat dikatakan bahwa fenomena feminin tidak ditemukan pada varietas PPKS yang diamati.

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“…As the best sites (Northern part of Sumatra and Western part of Kalimantan), were converted first, current expansion (10% years −1 for the last 40 years; Directorate general of estate crops, 2016a), includes climates and soils beyond the optimal range, such as in the eastern part of Kalimantan, southern part of Sumatra and wettest parts of Sulawesi, affecting yield in various ways (Woittiez et al, 2017). In areas with longer dry periods increased soil water buffering is needed, but acid soil conditions restrict root development (Mutert, 1999) and make the palms more vulnerable to water stress, leading to increase in male and reduction of female inflorescences (Breure, 1982;Gawankar et al, 2003;Adam et al, 2011) depressing fruit production approximately 12 months after the stress occurs (Corley and Tinker, 2015;Woittiez et al, 2017). While oil palm was promoted in Malaysia in the 1960's as part of an agricultural diversification program (Simeh and Ahmad, 2001), it replaced rubber in large areas, rather than complementing it.…”

Section: Introductionmentioning

confidence: 99%

Oil Palm Agroforestry Can Achieve Economic and Environmental Gains as Indicated by Multifunctional Land Equivalent Ratios

Khasanah¹,

Noordwijk

Slingerland

et al. 2020

Front. Sustain. Food Syst.

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Driven by increased global demand for vegetable oil in the food and biofuel sectors, oil palm plantations based on monoculture technology have expanded into lowland tropical forests. Interest in diversified, mixed oil palm systems is increasing as these might increase efficiency of the use of land and other resources, reduce farmer risk, and decrease greenhouse gas (GHG) emissions per unit product. Land Equivalent Ratio for provisioning services (LER P) values above 1.0 show that at least some diversified systems use land more efficiently than monocultures and are thus "land sparing," where monoculture LER P cannot exceed 1.0. Diversification also modifies climate and water regulating functions ("land sharing") relative to a forest reference, as indicated in the LER R index. A "multifunctional" LER M indicator combines both; land sparing plus land sharing effects jointly determine expected regulating services. Empirical assessment of multiple ecosystem services in agricultural landscapes is assisted by models that synthesise process-based knowledge, especially for perennial systems where welldesigned experiments require a full production cycle, and are costly and scarce. Agroforestry models explore spacing, intercropping and soil management options, predicting harvestable yields, impacts on water flows, nutrient leaching, and greenhouse gas emissions. We used the process-based Water, Nutrient and Light Capture in Agroforestry System (WaNuLCAS) model to explore mixed oil palm + cocoa and oil palm + pepper intercrop systems with modified ("double row") planting patterns for Indonesian contexts and estimated consequences for the carbon footprint. The oil palm + cocoa intercrop provided a high LER P (1.4), while also replenishing more ground water and having a lower C footprint. This combination also has a return to labour equal to that in oil palm monocultures and a higher benefit cost ratio than the oil palm + pepper combination that maximizes Net Present Value. Oil palm + cocoa systems are also less sensitive to price uncertainty for oil palm, and buffer for oil palm and cocoa production risks, assumed to be independent of each other. Considerable economic and environmental system improvements appear to be feasible through mixed oil palm systems and diversification as a pathway to intensification deserves full attention of research and policy development.

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Effect of water stress on growth and yield of Tenera oil palm.

Cited by 12 publications

References 0 publications

Analysis of Bunch Quality in Oil Palm Hybrid Cross Combinations under Krishna-Godavari Zone of Andhra Pradesh

Analysis of Bunch Quality in Oil Palm Hybrid Cross Combinations under Krishna-Godavari Zone of Andhra Pradesh

MENGENAL FENOMENA FEMININ PADA KELAPA SAWIT (Elaeis guineensis Jacq.)

Oil Palm Agroforestry Can Achieve Economic and Environmental Gains as Indicated by Multifunctional Land Equivalent Ratios

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