Kandungan,Resorpsi N dan P serta Spesific leaf Area Daun Kakao (Theobroma cacao L.) pada Cekaman Kekeringan

Abstract

Plant nutrient absorptions depend on their environtment and plants stage of development. Beside from soil, nutrient absorption also proceed through resorption in leaves. The resorption efficiency varies based on types of habitat. Drought is also influences the efficiency of nutrient resorption, growth rate, and plant development. The purpose of this research to study the change of nitrogen(N) and phosphorus (P) content and leaf resorption value of N and P, and specific leaf of 6 years old cacao grown under drought stress. Research was carried out in a cacao plantation with 7 years old Gliricidia sepium Jacq. as shading trees. The results showed that drought stress with Troughfall Displacement Experiment (TDE) system did not affect the content and resorption level of N and P of cacao leaves. However, N resorption of cacao trees tended to increase while P resorption decreased. Cacao plants had the leaf N resorption of 45.05-52.97%, leaf P resorption 36.64-44.10%. Drought stress for 13 months on years old cacao did not affect specific leaf area.