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JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA)JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA)

This research aims 1) to study the effect of organic mulch and earthworms under oil palm plantation on the total of population bacteria is still scarce, 2) to analyze the effect of organic mulch, earthworm density and the interaction between organic mulch and earthworm density on the total of population of bacteria. This research was carried out on May – August 2019. This research was 3 x 4 factorial experiment was placed according to a Split Plot Design with the basic design of Randomized Block Design, and each treatment was repeated 3 times. Organic mulch as the main plot were 3 types, namely: M1 (M. bracteata), M2 (oil palm empty fruit brunches/ OPEFB) and M3 (oil palm midrib). The density of earthworms as subplots consists of 4 levels, namely: C0 (0 worms/m2), C1 (35 worms/m2), C2 (50 worms/m2) and C3 (65 worms/m2). The data were analyzed using analysis of variance. If the treatment is significantly different, the treatment was tested by Duncans at 5% significance level. The results showed that oil palm midrib organic mulch can increase the total population of fungi and bacteria compared to M. bracteata and OPFEB. The earthworms density 50 and 65 worms/m2 can increase the total bacterial population compared to other earthworm densities. The combination of oil palm midrib with earthworms density 50 and 65 worms/m2 can increase the total population of bacteria.

The study concluded that oil palm frond organic mulch exhibited a higher total bacterial population compared to other organic mulches.Furthermore, earthworm densities of 50 and 65 individuals per square meter resulted in a greater total bacterial population than lower densities.The combination of oil palm frond organic mulch with earthworm densities of 50 and 65 individuals per square meter yielded the highest total bacterial population among all treatments.

Penelitian lebih lanjut perlu dilakukan untuk mengkaji pengaruh berbagai jenis pupuk organik terhadap komposisi dan aktivitas mikroba tanah pada perkebunan kelapa sawit. Hal ini penting untuk memahami bagaimana penggunaan pupuk organik dapat meningkatkan kesuburan tanah dan mengurangi ketergantungan pada pupuk kimia. Selain itu, studi tentang interaksi antara jenis cacing tanah yang berbeda dengan jenis mulsa organik tertentu dapat memberikan wawasan tentang kombinasi yang paling efektif untuk meningkatkan populasi bakteri dan kesehatan tanah. Terakhir, penelitian yang berfokus pada dampak jangka panjang dari aplikasi mulsa organik dan cacing tanah terhadap siklus nutrisi dan produktivitas kelapa sawit perlu dilakukan untuk memastikan keberlanjutan praktik pertanian ini. Penelitian-penelitian ini diharapkan dapat memberikan informasi yang berguna bagi petani dan pembuat kebijakan dalam mengelola perkebunan kelapa sawit secara berkelanjutan dan ramah lingkungan.

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