(STUDY OF INVIGORATION METHOD ON THE VIABILITY OF TWO SOYBEAN SEEDS LOT THAT HAD BEEN RESTORED FOR NINE MONTHS)

Nurmauli1), Yayuk Nurmiaty1)

ABSTRACT

Invigoration  is one method to solve the problem of overdue seeds.  Seeds are treated before planting to stimulate the metabolism activities inside the seeds so that seeds are equipped to emerge. Invigoration method could be applied using osmo-conditioning (Polyethylene Glycol (PEG-6000) solution) or matriconditioning, and hydrate-dehydrate treatment. Invigoration started when seeds imbibe in a solution with low water potential until seed water content could be reserved after its equilibrium.This study was conducted in Seed technology and breeding laboratory, Faculty of Agriculture, Lampung University in June 2009. Seeds testing with osmo-conditioning including: (1) hydrate-dehydrate treatment with aqua bides and (2) immersed into Polyethylene Glycol (PEG) with 10 and 20% concentration.  Observations were including: seeds emerge ability, sprout identical growth, dry mass of normal seeds, and electrical conductance.  All data were analyzed, described and presented with statistical methods and with histogram.  The results showed that: (1) Anjosmoro soybean seeds status which were overdue during storage were moderate stability which were showed by emerge viability observation (<70%) and (2) viability restoration and anjosmoro soybean seeds vigor which were overdue during storage using invigoration method tended to be the highest which were showed by observing seeds emerged ability, sprout identical growth, and sprout dry mass together with low electrical conductance. Keywords : Invigoration, seed, soybean, viability.

ABSTRAK

Invigorasi merupakan salah satu metode yang dapat digunakan untuk mengatasi benih-benih yang telah mengalami penyimpanan. Benih-benih harus diberi perlakuan sebelum ditanam untuk mengaktifkan metabolisme dalam benih sehingga benih dapat berkecambah. Metode invigorasi terdiri dari osmo-conditioning (seperti penggunaan polyethylene Glycol), matriconditioning, dan hidrasi-dehidrasi (seperti pelembaban dan perendaman). Invigorasi dimulai pada saat benih imbibisi dalam suatu pelarut dengan potensial air rendah sampai kadar air benih dapat dipertahankan setelah mencapai keseimbangan. Penelitian ini dilaksanakan di Laboratorium Teknologi Benih dan Pemuliaan Tanaman Fakultas Pertanian Universitas Lampung pada bulan Juni tahun 2009. Pengamatan meliputi: daya berkecambah, keserempakan berkecambah, jumlah kecambah normal kuat, bobot kering kecambah, dan daya hantar listrik (DHL). Semua data diuji dengan Uji Histogram.  Hasil penelitian menunjukkan bahwa (1) status benih kedelai varietas Anjasmoro yang mengalami kemunduran setelah penyimpanan adalah viabilitas sedang yang terlihat pada pengamatan daya berkecambah (<70%) dan (2) perbaikan viabilitas dan vigor benih kedelai varietas anjasmoro yang mengalami kemunduran selama penyimpaman melalui metode invigorasi yaitu pelembaban cenderung paling tinggi yang terlihat pada pengamatan daya berkecambah, keserempakan berkecambah, dan bobot kering kecambah, serta memiliki nilai daya hantar listrik yang rendah. Kata kunci : Invigorasi, benih, kedelai, viabilitas.