1Agrotechnology Study Program, Faculty of Agriculture, Tunas Pembangunan University, Surakarta, Indonesia.
2Agrotechnology Study Program, Faculty of Agriculture, PGRI University, Yogyakarta, Indonesia.
*Corresponding Author: Achmad Fatchul Aziez, Agrotechnology Study Program, Faculty of Agriculture, Tunas Pembangunan University, Surakarta, Indonesia. Email: achmad.aziez@yahoo.com
Drought has its own impact on agriculture, such as decreased food productivity, including rice. The response of rice plants in the dry season starts with physiological responses in the form of reduced transpiration rate by closing the stomata. This will affect the morphology of the plant, such as reduced crown and leaf size. Various rice varieties have different characteristics in minimizing the impact of drought stress.
The design used was a completely randomized block design (CRD) with 2 factors and 2 replications. The first factor was the type of variety, namely IR64, Mamberamo, Situbagendit, Way Apo Buru, Inpari32 and IM-70D and the second factor was the irrigation interval, namely 1, 2, 4 and 6 days. This study was conducted in polybags with Entisol soil types in Demangan Village, Sambi District, Boyolali Regency, Central Java, Indonesia, which is located at an altitude of 113 m above sea level.
The type of variety significantly affected the leaf area index and typical leaf weight; the irrigation interval only affected the leaf area index and the interaction of the two treatments affected the typical leaf weight. The highest leaf width index was found in the IR64 variety, while the highest typical leaf weight was found in the Way Apo Buru variety. Proline levels did not differ across all treatment interactions.
Drought stress, Growth analysis, Physiological response, Proline, Rice varieties
