Padi (Oryza sativa L.) merupakan komoditas tanaman pangan yang penting di Indonesia luas panen padi gogo masih sangat kecil yakni seluas 6.898 ha atau baru mencapai 3,17 % dari luas panen padi sawah yang mencapai 217.428 ha. Salah satunya adalah kesuburan tanah yang berpengaruh terhadap produksi tanaman padi. Penelitian ini menggunakan Rancangan Acak kelompok terdiri dari dua faktor yaitu: Faktor 1, beberapa varietas padi gogo terdiri dari 4 varietas yaitu :Impago 7, Impago 10, Situbagendit, dan Varietas Lokal. Sedangkan Faktor faktor 2 pemberian Biochar dari kulit buah kakao tiga taraf yaitu: 0, Biochar 200 gram/bedengan, dan Biochar 400 gram/bedengan.Hasil penelitian antara lain: Interaksi antara berbagai varietas padi gogo dengan Biochar kulit kakao tidak memberikan pengaruh nyata pada semua parameter yang diamati. Varietas Situ Bagenditmemberikan pengaruh baik pada parameter tinggi tanaman umur 4 MST, begitu pula dengan Varietas local memberikan pengaruh baik pada parameter tinggi tanaman umur 8 MST. Pemberian Biochar 400 gram/bedengan memberikan pengaruh baik pada parameter jumlah daun umur 4 dan 8 MST, jumlah anakan dan berat 1000 bulir gabah dan. Sedangkan dosis Biochar 200 gram/bedengan juga memberikan pengaruh baik pada parameter tinggi tanaman umur 4 MST, hasil biomassa dan Rata-Rata Produktivitas  dalam ton/ha.

Seaweed (Kappaphycus alvarezii) is one of the aquatic commodities that has the potential to be developed due to demand reaching the international market (Ari, SP and Risna Yusuf, 2018). Provision of seeds is still carried out by vegetative means (cuttings) (Runtuboy N and Slamet Abadi, 2018). However, there are problems, especially the provision of quality seeds, large scale, and does not depend on the season. Provision of seeds can also be done generatively. K. alvarezii can be developed by exploiting the nature of sexual reproduction through the development of spores which are characterized by the presence of cystocarp on the surface of the thallus (Juniarta I, 2016). However, the cystocarp in its growth really needs nutrition in order to produce spores of good quality and quantity. The nutrients needed are nitrogen and phosphate. This is due to the role of nitrogen as a constituent of protein and phosphate as a provider of energy (Pauwah A, et al., 2020). The purpose of this study was to determine the dose ratio of nitrogen and phosphate enrichment on cystocarp development. The research was carried out from November 2018 to February 2019, at the Seaweed Laboratory of the Takalar Brackish Water Aquaculture Fishery Center (BPBAPT). The study contained 6 treatments with 3 repetitions, namely Treatment A = Without enrichment (SW), Treatment B = 0.5 ppm N: 0.5 ppm P, Treatment C = 1 ppm N: 0.5 ppm P, Treatment D = 1.5 ppm N : 0.5 ppm P, Treatment E = 0.5 ppm N : 1 ppm P, and Treatment F = 0.5 ppm N : 1.5 ppm P. The results showed that the highest germination was in treatment D with an average of 56.95%. However, the research was not significantly different between treatments (p>0.05).

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