Stomatal Performance Of Soybean Genotypes Due To Drought Stress And Acidity

Abstract This research aims to classify soybean genotypes tolerant and susceptible to drought and acidity and to determine level of water content and observation parameters which can be used as an indicator of genotypes selection againts drought stress and acidity. The results are expected to give contribution in the development of soybean plants on acid dry land. Research was carried out as experimental study using a Split Plot design SPD with soil moisture levels k as main plot MP and soybean genotypes g as sub plot SP. The soil moisture levelswere set based on the percentage of soil water content consisted of four levels e.g. 100 field capacity k0 80-100 field capacity k1 60-80 of field capacity k2 40-60 of field capacity k3. Soybean genotypesused as the sub plot were g1 variety Menyapa 50 Gy g2 var. Orba 25 Gy g3 var. Tanggamus 0 Gy g4 var. Tanggamus 25 Gy g5 var. Tanggamus 50 Gy g6 var. Orba 50 Gy g7 var. Menyapa 0 Gy and g8 var. Orba 0 Gy. A total of 32 teratment combination was obtained and planted on acid dry land. The data was analyzed using statistical software Excel. Study results indicate that 1 genotype tolerant to drought and acidity were g1 var. Menyapa 50 Gy g2 var. Orba 25 Gy g3 var. Tanggamus 0 Gy g4 var. Tanggamus 25 Gy g5 var. Tanggamus 50 Gy 75Gy and g6 var. Orba 50 Gy while sensitive genotypes were g7 var.Menyapa 0 Gy and g8 var. Orba 0 Gy 2 soil moisture content of 40-60 field capacity can be used an indicator of resistance to drought and acidity 3 The parameter of the root volume length of stomata stomatal pore width number of stomata and relative chlorophyll index can be used as an indicator of selection for soybean genotypes againts drought stress and acidity.