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Expansion of rice cultivation into new irrigated areas

Expansion of rice cultivation into new irrigated areas

Zemledelie 12: 27-34

A study of the effect of the length of the day on the duration of the growth period, carried out in the Krasnodar krai and in Rostov and Volgograd oblasts, showed that the growth period of rice increased as the length of the day was increased artificially during the expansion of rice cultivation into more northern latitudes. Heavy seeding resulted in a slight increase in the rate of maturation due to the smaller tillering coefficient under these conditions. With periodic irrigation, heading and full maturity set in 5 days later and in the productivity of the plants was lower than after flooding, leading the author to recommend heavier seeding (8 million grains/ha) and cultivation of rice under conditions of constant flooding in the new regions. In regions located to the south of the isotherm along which the average daily temperature is 15[degree]C from the middle of May to at least Sept. 10, rice can also be cultivated successfully with constant flooding on saline and swampy soils in the presence of irrigation systems of an engineering type. Soils of this type are found in the Astrakhan, Volgograd, Rostov, Zaporozh'e, Kherson and other oblasts.

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Accession: 024649411

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