DAYA HASIL GALUR-GALUR PADI SAWAH GENERASI LANJUT PADA KONDISI TERCEKAM KEKERINGAN

Estria F. Pramudyawardani, Rina H. Wening, Untung Susanto

Abstract


Kekeringan pada lahan sawah merupakan masalah yang kerap kali menjadi ancaman pada budidaya padi.
Penggunaan varietas yang tepat dapat mengurangi resiko kehilangan hasil yang terlalu besar. Penelitian ini
bertujuan untuk mengetahui keragaan hasil 220 galur padi sawah generasi lanjut di lahan kering dibandingkan
dengan lahan optimal. Percobaan dilaksanakan pada musim kemarau di kebun percobaan BB Padi Sukamandi,
menggunakan rancangan augmented 5 blok dengan 4 varietas pembanding (INPARI 10, INPARI 13, Situ
Bagendit, dan Limboto). Perlakuan lahan optimal sesuai dengan cara budidaya yang disarankan, sedangkan lahan
kering hanya diairi hingga 4 minggu setelah tanam. Luas plot yang digunakan 1 m x 5 m per galur. Pengamatan
dilakukan terhadap umur berbunga 10% dan 50% (hss), tinggi tanaman (cm), jumlah anakan dan malai per rumpun,
bobot seribu butir (gram), dan hasil per plot (kg) dikonversikan menjadi t/ha GKG. Pengamatan terhadap kondisi
air tanah, kelengasan tanah, serta skoring gejala kekeringan ditambahkan untuk lahan kering. Sebanyak 23 galur
memperoleh hasil lebih baik dari Situ Bagendit (2,32 t/ha GKG) di lahan optimal dan 17 galur lebih baik dari
Limboto (1,05 t/ha GKG) di lahan kering. Galur BP15704b-14 dan A 62-1 (BP10764f-10-2) teridentifikasi tumbuh
baik di kedua lahan. Tujuh galur dengan produktivitas setara Limboto mempunyai mekanisme ketahanan terhadap
kekeringan. Kondisi kekeringan menurunkan tinggi tanaman, bobot seribu butir, dan hasil.
Kata kunci: daya hasil, galur padi, lahan kering, kekeringan
ABSTRACT
Drought often pose a threat to rice cultivation because water is an essential requirement in rice growth.
Drought tolerant varieties are expected to mitigate the risks of drought stress. This study aims to determine the
performance of 220 advance lines in the dry land as compared with the optimum land. Experiment conducted at
Sukamandi esperimental station during dry season. Experiment was arranged in augmented 5 blocks with 4 check
varieties (INPARI 10, INPARI 13, Bagendit, and Limboto). The optimum land treatment irrigated based on the
recommended cultivation, while the dry land treatment irrigated until 4 weeks after planting only. The plot area
was 1 m x 5 m per lines. Observations was done for: days to 10% and 50% flowering (DAS), plant height (cm),
number of tillers and panicles per hill, thousand grain weight (g), and yield per plot (kg) converted to t/ha. Addition
observations on dry land treatment was done for groundwater, soil moisture, and scoring drought symptom. The
result showed 23 lines had higher yield than Situ Bagendit (2.32 t/ha) in optimum land, while 17 lines had higher
yield than Limboto (1.05 t/ha) in dry land. BP15704b-14 and A 62-1 (BP10764f-10-2) was identified had stable
yield on both treatment. Seven lines which similar with Limboto productivity was estimated to have resistance
mechanisms for drought stress. Drought stress decline plant height, grain weight, and yield.
Key words: potential yield, dry land, drought

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DOI: http://dx.doi.org/10.20884/1.agrin.2017.21.2.370

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Agrin
Agriculture Research Journal
Faculty of Agriculture, Jenderal Soedirman University
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