Abstract
The dual system planting aims to utilize existing resources so that they can be more efficient. The research design used separate plots repeated three times. The main plot consisted of soybean spacing of 40 cm x 10 cm (1 plant per hole) (JT-1), 40 cm x 15 cm (2 plants per hole) (JT-2) and 40 cm x 20 cm (2 plants per hole). Lubang) (JT-3), a subplot consisting of 11 varieties of soybeans. Soybeans were planted in 3 rows along 5 m which were intercropped with maize varieties Lamuru (120-50 cm) x 20 cm, (1 plant/hole) at IP2TP Muneng, Probolinggo Regency, East Java in MK II 2018. The results showed that the varieties "Dena 1" and "Deja 1" matched the intercropping pattern with maize, which were able to achieve seed productivity of 2.17 t/ha and 2.13 t/ha, respectively. Argomulyo and Anjasmoro varieties in JT-1, Deja 1 on JT-2, and Deja 2 on JT-3 were able to achieve seed productivity of up to 2.0 t / ha. The phenotypic weight of seeds per plant and the number of filled pods were two components that contributed greatly to the increase in seed productivity. Dena 1 varieties correspond to JT1 and JT-2 treatments, while Deja 1 varieties correspond to JT-3 treatments. The phenotypic weight of 100 seeds, plant height, and the number of branches contributed little to the increase in seed productivity.
Highlights
The dual system planting aims to utilize existing resources so that they can be more efficient
The main plot consisted of soybean spacing of 40 cm x 10 cm (1 plant per hole) (JT-1), 40 cm x 15 cm (2 plants per hole) (JT-2) and 40 cm x 20 cm (2 plants per hole)
Lubang) (JT-3), a subplot consisting of 11 varieties of soybeans
Summary
Hasil analisis varian menunjukkan bahwa perlakuan jarak tanam (petak utama) mengindikasikan mempunyai berpengaruh kuat terhadap 11 varietas/genotipe kedelai yaitu pada bagian tinggi tanaman, jumlah polong isi, dan hasil biji jagung. Varietas kedelai yang tidak terpengaruh kuat perlakuan jarak tanam yang terkait dengan jumlah populasi tanaman pada kondisi tumpangsari masih mampu menunjukkan potensi hasil hingga mencapai > 2,5 t/ha, dan sebaliknya. Varietas Devon 2 pada perlakuan JT-1 dan JT-2 tetapi jarak tanam yang lebih lebar (perlakuan JT-3) memiliki bobot biji per tanaman lebih tinggi, tetapi masih sebanding dengan varietas Dena 1, Anjasmoro, Deja 1, dan Deja 2 (Tabel 2). Ukuran biji yang besar pada varietas Devon 2 di perlakuan JT-3 serta kontribusi dari bobot biji per tanamannya mampu memperoleh produktivitas biji menyaingi varietas Dena 1 dan Deja 1 (Tabel 2). Diprediksi perbedaan tersebut karena pengaruh vegetasi tanaman kedelai, seperti varietas Dena 1, Deja 2 maupun Anjasmoro mempunyai batang tanaman relatif lebih tinggi dibandingkan dengan Dega 1, Devon 2 dan GH Gr3 yang relatif pendek. Potensi biji kedelai tumpangsari dengan jagung pada masing-masing jarak tanam, Probolinggo, MK1 tahun
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