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All Journal Jurnal Ecosolum Journal of Degraded and Mining Lands Management
Gusli, Sikstus
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Environmental Science

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Kompetisi Akar Kakao dan Langsat Dalam Serapan Nitrogen Pada Sistem Agroforestri Sederhana: Evaluasi Setahun Setelah Aplikasi Pupuk: Competition of Cacao and Langsat Roots In Nitrogen Uptake Under Simple Agroforestry System: A Year After Fertillizer Application Narthim, Bhernika Bunga Beby; Gusli, Sikstus; Laban, Sartika
Jurnal Ecosolum Vol. 13 No. 1 (2024): JUNI
Publisher : Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ecosolum.v13i1.32890

Abstract

Sistem agroforestri di Dusun Lemo Baru Kabupaten Polewali Mandar memerlukan perhatian khusus mengenai persaingan antar tanaman terhadap serapan hara dan pertumbuhan akar. Penelitian ini bertujuan untuk mempelajari respon akar dan serapan hara kakao dan langsat terhadap dosis nitrogen yang berbeda. Pada kebun agroforestri dilakukan pemupukan nitrogen  dengan empat dosis yaitu perlakuan kontrol; pemupukan Urea dosis 354 g pohon-1; Phonska Plus 500 g pohon-1; dan Phonska Plus 500 g pohon-1 + Urea 190 g pohon-1 diletakkan di ingrowth hole diantara pohon kakao dan langsat. Setelah setahun pemupukan dilakukan pengambilan sampel tanah, akar dan daun. Sampel tanah dan daun dianalisis serapan hara, analisis keragaman dan Independent Sampel T-Tes(2-tailed) dengan taraf kepercayaan 5%. Sampel akar dilakukan perhitungan panjang akar menggunakan software ImageJ, kerapatan panjang akar dan panjang akar spesifik. Hasil penelitian menunjukkan nilai SRL langsat tertinggi pada perlakuan kontrol dan nilai RLD tertinggi pada Phonska Plus 500 g pohon-1. Aplikasi pupuk berpengaruh nyata terhadap SRL kakao dan tidak memberikan pengaruh terhadap RLD. Perlakuan kontrol berbeda nyata dengan pemupukan Urea dengan dosis 354 g pohon-1, Phonska Plus 500 g pohon-1 dan Phonska Plus 500 g pohon-1 + Urea 190 g pohon-1.  Pemupukan Urea 354 g pohon-1 berbeda nyata dengan Phonska Plus 500 g pohon-1 +  Urea 190 g pohon-1.  Nilai tertinggi RLD terdapat pada perlakuan Urea 354 g pohon-1. Serapan hara jaringan langsat dan kakao tertinggi pada pemupukan Phonska Plus 500 g pohon-1 + Urea 190 g pohon-1. Akar langsat mampu menyerap hara lebih banyak dibandingkan dengan akar kakao.
Implication of the root growth and soil macropores distribution on sugarcane yield in Takalar, Indonesia Safitri, Wina; Ala, Ambo; Gusli, Sikstus; Salim, Iqbal
Journal of Degraded and Mining Lands Management Vol. 11 No. 4 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.114.6175

Abstract

This study examined the relationship between the decline in sugarcane productivity and the distribution of macropores and depth of root penetration in sugarcane plantations in Takalar during one planting period (October 2021-September 2022). There were five observation points (P1, P2, P3, P4, and P5) in one hectare of land to measure the distribution of soil macropores using methylene blue solution. Cross-sections of the soil were made to observe the presence of plant roots at a depth of 0-40 cm with a width of 60 cm. In each plot, disturbed soil samples were collected to measure soil texture, soil organic matter (SOM), nitrogen (N), phosphorus (P), and potassium (K) contents. Other measurement parameters were the infiltration rate and plant productivity. The results indicated that SOM and NPK levels at the research location were deficient, serving as the first indicators of problematic soil. Macropore observations revealed that macropores were distributed only at a less than 10 cm soil depth. This distribution limited the penetration of plant roots to a depth of   0-40 cm. The root length density (RLD) value indicated the absence of roots at depths of 30-40 cm in plots P2 and P3. The field findings explained why sugarcane production in Takalar only achieved 50%, around 40 t ha-1 from the first ratoon sugarcane harvest, instead of the expected 70-80 t ha-1.
Improving sugarcane productivity on marginal soil in Takalar, Indonesia, through the application of sugarcane factory waste Safitri, Wina; Ala, Ambo; Gusli, Sikstus; Salim, Iqbal
Journal of Degraded and Mining Lands Management Vol. 12 No. 1 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.121.6809

Abstract

Marginal soil with low nutrient content is a crucial problem in reducing crop productivity, including sugarcane. This study aimed to elucidate the possible improvement of the physical and chemical properties of marginal soil through the application of organic waste from sugar factories, namely kettle ash and press mud. Nine treatment combinations of 0, 10, and 20 t ha-1 of each kettle ash and press mud were arranged in a two-factor randomized factorial design with three replications. Soil organic matter, N, P, and K, soil aggregate stability, and sugarcane productivity were measured after planting sugarcane for five months. The results showed that the application of kettle ash and press mud, especially with a ratio of 20 t ha-1 kettle ash and 10 t ha-1 press mud, was able to reduce the leaching of organic matter and improve sugarcane growth, particularly increasing the number of tillers by 16%, stem height by 14%, and diameter by 16%. The sugarcane productivity obtained was 58.02 t ha-1. Other portions of kettle ash and press mud did not have a favorable effect on sugarcane productivity. This study provided practical insights for increasing agricultural productivity, especially in sugarcane plantations.
Co-Authors Ambo Ala, Ambo iqbal salim Laban, Sartika Narthim, Bhernika Bunga Beby Safitri, Wina