Fatty Acid Composition of Sesame (Sesamum indicum L.) Seeds in Relation to Yield and Soil Chemical Properties on Continuously Monocropped Upland Fields Converted from Paddy Fields
by
Cosmas Wacal 1,*
, Naoki Ogata 2, Daniel Basalirwa 1, Daisuke Sasagawa 1, Masako Kato 2, Takuo Handa 1, Tsugiyuki Masunaga 3, Sadahiro Yamamoto 4 and Eiji Nishihara 4,*
Cosmas Wacal 1,*, Naoki Ogata 2, Daniel Basalirwa 1, Daisuke Sasagawa 1, Masako Kato 2, Takuo Handa 1, Tsugiyuki Masunaga 3, Sadahiro Yamamoto 4 and Eiji Nishihara 4,*
1
United Graduate School of Agricultural Sciences, Tottori University, 4-101 Koyama Minami, Tottori 680-8553, Japan
2
National Institute of Crop Science, National Agriculture and Food Research Organization (NARO), 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8518, Japan
3
Faculty of Life and Environmental Sciences, Shimane University, Matsue, Shimane 690-8504, Japan
4
Faculty of Agriculture, Tottori University, 4-101 Koyama Minami, Tottori 680-8553, Japan
*
Authors to whom correspondence should be addressed.
Agronomy 2019, 9(12), 801; https://doi.org/10.3390/agronomy9120801
Received: 4 November 2019 / Revised: 22 November 2019 / Accepted: 22 November 2019 / Published: 24 November 2019
We evaluated the fatty acid compositions in relation to yield and soil nutrients from four fields A, B, C, and D with continuous monocropping histories of 0–3 years, respectively, in Japan from 2015 to 2016. Results showed that, in both evaluation years, seed yield did not significantly differ among the fields although field A produced the highest mean seed yield and 1000-seed weight. Between fields A and C, 1000-seed weight showed significant differences. The contents of seed-saturated fatty acids lauric and myristic decreased in only fields C and D whereas oleic, linoleic, and linolenic acids increased in field D. Only field A produced the highest contents of lauric and myristic acids whereas field D produced the highest contents of linoleic and linolenic acids. The soil total N and exchangeable K contents tended to decrease as exchangeable Mg content significantly increased on the fields with long duration of cropping, fields C and D. Principal component analysis revealed significant positive correlations between soil exchangeable K, and total N contents with 1000-seed weight and lauric acid, as exchangeable Mg content was related with oleic, linoleic, and linolenic acids. Therefore, the high oleic, linoleic, and linolenic acids from field D were mainly attributed to high soil exchangeable Mg content, whereas the high 1000-seed weight, lauric acid and myristic acid were due to the high soil exchangeable K content in field A. Overall, the fatty acid composition quality on the long-duration continuously monocropped fields could show high economic value at the expense of yield under this management practice in continuous monocropping.
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Keywords:
Sesamum indicum L.; continuous monocropping; 1000-seed weight; lauric acid; linoleic; exchangeable K; exchangeable Mg
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MDPI and ACS Style
Wacal, C.; Ogata, N.; Basalirwa, D.; Sasagawa, D.; Kato, M.; Handa, T.; Masunaga, T.; Yamamoto, S.; Nishihara, E. Fatty Acid Composition of Sesame (Sesamum indicum L.) Seeds in Relation to Yield and Soil Chemical Properties on Continuously Monocropped Upland Fields Converted from Paddy Fields. Agronomy 2019, 9, 801.
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