ADAPTASI MORFOLOGI DAN FISIOLOGI TANAMAN PORANG (Amorphophallus oncophyllus Prain.) TERHADAP VARIASI INTENSITAS CAHAYA DAN JENIS PENAUNG

• Main Authors: , ADITYA RAHMADANIARTI, , Dr. Ir. Eny Faridah, M.Sc.
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2013
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/122801/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=62908
• Institution: Universitas Gadjah Mada

Konjac (Amorphophallus oncophyllus Prain.) is one kind of food crops that have a high tolerance for shaded environments. The growth and productivity of konjac could be disturbance while not in accordance with optimal growing conditions. The research was conducted in community forest Nglanggeran, Gunung Kidul, plantation forest Wanagama I, and controlled environments (nursery). Field and laboratory research was conducted during three months, including the measurement of environmental factors, morphological and physiological characters of konjac. Data analysis using analysis of variance (ANOVA), regression and correlation. Results showed that light intensity factors significantly affect to the morphological and physiological responses of konjac in nursery, while in the community forest Nglanggeran no real affect. Light intensity range of 45-70% was optimal light intensity for growth and productivity of konjac. In addition, physiological response of konjac in the light intensity 45-70% was increased chlorophyll content, but the numbers of leaf stomata between open and shaded area relatively insignificant. However, the efficiency of storage root production of konjac at high light intensity (open area) was relatively larger than shaded area. Negative correlation was shown by leaf area and tuber dry weight in shaded and open areas. In contrast to the plantation forest in Wanagama I, stands factors more significantly affect to the growth and productivity of konjac, than light intensity. The growth and productivity under acacia stands relatively better than teak and eucalyptus. In addition, the content of chlorophyll and efficiency of storage root production under acacia stands were relatively higher, but the numbers of leaf stomata was relative not significantly different between teak, acacia and eucalyptus. Positive correlation was shown by leaf area and tuber dry weight of konjac under teak stands, otherwise negative correlation was shown under acacia and eucalyptus stands.