The rice institute of the Academy of Agricultural Science has recently bred new rice varieties, which can reap good harvest in low-yielding soils, before establishing their cultivation methods.
The type of low-yielding soil can be divided into basic, cold and damp soils, rain-dependent paddies, flooded land and those that produce poor yield due to soil erosion and loss by flood.
Researchers conducted research to breed varieties that are highly resistant to salt and suitable for tidelands and succeeded in breeding five high-yielding strains of rice. Especially, the F1 rice variety is estimated as a high-yielding F1 rice variety with high resistance to salt which is two to three tons greater in yield than ordinary rice varieties under the same salt condition.
They also breed a rice variety which is highly resistant to cold-weather damage.
In the wake of breeding four high-yielding F1 rice and ordinary rice varieties suitable to cold and damp soils including the area on the east coast of Korea, they laid foundations for breeding a high-yielding rice strain which is highly resistant to cold weather and whose yield is higher than the indigenous one in the paddy field affected seriously by cold weather.
“According to the trial production in the paddy field affected seriously by cold weather in Sangam-ri, Kangdong County, Pyongyang, the yield of a new rice variety was over six tons per hectare in the cold and humid soil whose per-hectare yield was only 2 to 3 tons,” said Kang Yong Ho, section chief of the institute.
Researchers are also successful in breeding drought-resistant rice strain which can ensure safe and rich harvest in rain-dependent paddies and other water-deficient fields that occupy large areas.
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