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http://dx.doi.org/10.7740/kjcs.2019.64.4.459

Changes in Growing Period and Productivity under Double Cropping of Spring Potato and Summer Cereals in Paddy Fields of Southern Korea  

Seo, Jong-Ho (Paddy Crop Research Division, Department of Southern Area Crop Science, National Institute of Crop Science)
Hwang, Chung-Dong (Paddy Crop Research Division, Department of Southern Area Crop Science, National Institute of Crop Science)
Choi, Weon-Young (Technology Transfer Division, National Institute of Crop Science)
Bae, Hyeon-Kyung (Paddy Crop Research Division, Department of Southern Area Crop Science, National Institute of Crop Science)
Kim, Sang-Yeol (Paddy Crop Research Division, Department of Southern Area Crop Science, National Institute of Crop Science)
Oh, Seong-Hwan (Paddy Crop Research Division, Department of Southern Area Crop Science, National Institute of Crop Science)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.64, no.4, 2019 , pp. 459-468 More about this Journal
Abstract
Changes in growing periods and productivities of crops under double cropping of potato-rice, potato-soybean and potato-maize, were investigated at the Paddy Experimental Fields in Miryang City from 2015 to 2018. Spring potatoes planted in early March showed a yield of 2.1-2.3 ton/10a and a period of 90 days. In double cropping, growing period of rice, soybean, and maize was about 130, 125 and 115 days, respectively. The potato yield obtained was as much as 616, 330 and 815 kg/10a under double cropping with rice, soybean and maize, respectively. It is beneficial to sow the spring potatoes as early as possible to increase the yield and to secure the growing period of sequential crops. The introduction of summer medium-late variety grain crops into double cropping of spring potato and rice as well as into double cropping of spring potato and soybean/maize, was possible because of no sowing in the fall and plants were able to reach the heading growth stage before the safe heading limit of rice in particular. In the case of maize, the growth period was different according to the change in temperature over the year. The introduction of upland crops such as soybeans and maize instead of rice improved soil physicochemical properties in a short period of time, contributing to the increase of spring potato yields, but there was also a risk of damage by successive cropping for more than three years. Spring potato-maize showed higher yield in terms of starch production, and spring potato-soybean was found to be advantageous for net income.
Keywords
double cropping; maize; paddy field; potato; rice; soybean;
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Times Cited By KSCI : 2  (Citation Analysis)
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