High-cold rice yields 600 kilograms per mu, breaking through the “48° north latitude”

“It is impossible to grow rice above 48 degrees north latitude”—this is a well-known authoritative conclusion on rice production in Heilongjiang Province. However, in this fall, the verdict was completely broken. The reporter learned from the Provincial Agriculture Commission that, through the combined use of farming techniques, variety selection, and high-yielding cultivation techniques, the province's high-yielding trials of rice in Xunk County, Nenjiang County, and Sunwu County in the northern region have achieved notable results and the highest per mu output has been achieved. More than 600 kg.

According to Dong Guozhong, a rice expert from the Provincial Agricultural Technology Promotion Station, Xunke County is located at latitude 47°58′～49°36′, which is a cold temperate continental monsoon climate with an effective accumulated temperature of 1700°C to 2300°C. 600 acres of rice are planted and the yield is about 500 kilograms. Sunwu County is located in the north latitude 48°59′～49°42′, which belongs to the cold temperate continental monsoon climate. The effective accumulated temperature is only 1571 degrees to 2117 degrees. This year, 30 acres of rice are planted in Dahua Linzi Village along Yanjiang Township, and the yield is 550 per mu. About 3,000 kilograms of rice planted in the fourth management area of ​​the local Red Frontier Farm is more than 600 kilograms per mu. In Nenjiang County, which is located at latitude 48°42′35′′-51°00′05′′, this year, 1,500 mu of rice is planted in Qianjin Town, Yilaha Township and Linjiang Township. The yield per mu is above 500kg.

In the past, rice production also occurred in the northern part of our province, but the output has been hovering at a low level of 700 pounds per mu. Lu Yushuang, head of the Provincial Agricultural Technology Extension Station, said that from the past energy production to the current high yield, the significant increase in rice production indicates that the province’s rice production has truly exceeded the “latitude limit of 48 degrees north latitude”. On the one hand, global warming has provided favorable conditions for the adjustment of agricultural planting structure and northward expansion of paddy fields in the northern part of the province. On the other hand, modern agricultural development has contributed. The realization of the high yield of rice in the northern part of our province is the joint effect of good practices.

The comprehensive use of early-maturing varieties, greenhouse cultivation, mechanical transplanting, planting cultivation, formula fertilization, low-temperature chilling defense, especially deepwater insulation irrigation during the critical period, spraying foliar fertilizer and other technologies are widely used.

It is understood that in the northern region of our province, from 48 degrees north latitude to 51 degrees north latitude, there are about 20 million mu of cultivated land. The local water resources are abundant. The annual rainfall is between 550 mm and 600 mm. There are rivers and their tributaries such as Heilongjiang River, Tongken River, and Nyar River in the region. The potential and space for the development of rice production are huge.