Abstract
Drought stress is a major constraint to the production and yield stability of soybean (Glycine max (L.) Merr). Drought stress at the generative phase had a negative impact on soybean potential yield significantly. This study evaluated variation in five soybean genotypes (G1, G2, G3, G4 and G5) in their response to the three levels (100% of field capacity (D1), 80% from field capacity (D2) and 60% from field capacity (D3)) of drought stress in a glass house. This study was arranged in a factorial randomized completely block design with three replications. Results showed that all five genotypes responded significantly (P<0.05) to the drought stress treatments in soybean yield. The average yield was respectively reduced by 8.4% and 11.6% in the D2 and D3 treatments, respectively, compared to the D1 (control). Percent reduction of yield for genotype G4 (19.8%) was lower compared to other genotypes. This is indicated that genotype G4 tolerance to drought stress. The evaluation on the morphological character was potentially to become a screening tool for soybean breeding program.
Highlights
ABSTRAK: Tujuan penelitian ini adalah untuk mengevaluasi pertumbuhan dan hasil lima genotipe kedelai (G) terhadap tiga tingkat kekeringan (D) yang diuji dalam rumah kaca
The study was arranged in factorial RAK 3 times
yield parameters was carried out using ANOVA followed by
Summary
Tujuan penelitian ini adalah untuk sangat diperlukan dalam program perakitan mengevaluasi pertumbuhan dan hasil beberapa varietas kedelai tahan kekeringan. Genotipe kedelai terseleksi dari satu metode seleksi genotipe tanaman secara ketiga cekaman akan digunakan untuk tidak langsung yang relatif mudah dilakukan. Identifikasi kekeringan pada tanaman Alat dan bahan kedelai dapat dilihat secara morfologi dan Tanaman kedelai ditanam dalam pot fisiologi, seperti pola perakaran, jumlah plastik berukuran 35 x 30 cm (bobot media stomata, penyesuaian osmotik, fotosintat dan tanam 7 kg) tiga biji per pot. (2010) 5 kg KCl/ha (0.105 g/pot) diaplikasikan pada melaporkan bahwa kekurangan air saat tanam dengan cara dicampur rata dengan meningkatkan nisbah akar terhadap tajuk media tanam. Metode yang digunakan Penentuan kapasitas lapang media berdasar pada pendekatan jumlah air yang mengisi pori-pori tanah (Veihmeyer & Hendrickson, 1949 dalam Ghorbani dkk., 2017). Berat kering tanah (BK) ditentukan dengan cara mengeringkan media tanam BB selama 48 jam pada suhu 110oC. Setelah media tanam dingin dengan cara memasukkannya dalam desikator, kemudian media tanam ditimbang sehingga diperoleh data BK
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