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Khem B.,Design Science | Hirai Y.,Design Science | Yamakawa T.,Design Science | Yamakawa T.,Laboratory of Plant Nutrition | And 5 more authors.
Journal of the Faculty of Agriculture, Kyushu University | Year: 2015

The cultivation area of rice for whole crop silage (WCS) has rapidly increased in the last decade in Japan due to increasing demand for domestic livestock feed as well as a measure for the use of redundant paddy field. On the other hand, the production cost of rice for WCS is largely supported by subsidy now, so it is required to reduce the production cost. Manure application is a prospective way to reduce the cost of fertilizer and to sustain soil fertility. Thus, we investigated the production of rice for WCS using manure in Itoshima region, Fukuoka Prefecture, Japan, from the aspects of soil fertility, plant growth, and dry matter weight. The fields where manure was applied showed relatively high TN contents in soil whereas fields where manure was not applied showed low TN contents. This result indicated that soil fertility can be deteriorated by the continuous production of rice for WCS when organic matter is not supplied by manure and other materials. Plant length (r=0.748∗) and tiller number (r=0.891∗∗) at panicle initiation stage were closely correlated with TN content in soil whereas SPAD readings (r=0.846∗∗) at the same stage was closely correlated with mineralized N in soil. Dry matter weight was positively correlated with TN content in soil (r=0.767∗∗). Fields where manure was not applied had small dry matter weight although nitrogen was supplied from fertilizer. These results indicated that dry matter weight was significantly affected by soil fertility. Source


Sugimoto T.,Hyogo Agricultural Institute for Agriculture | Watanabe K.,Hyogo Agricultural Institute for Agriculture | Watanabe K.,Tokyo University of Agriculture | Yoshida S.,Hyogo Agricultural Institute for Agriculture | And 5 more authors.
Plant Disease | Year: 2010

The effect of calcium compounds [Ca(HCOO)2-A and Ca(NO 3)2] on the incidence of Phytophthora stem rot of soybean (Glycine max) cv. Tanbakuro was investigated in the field. Disease incidence in control plants in three fields naturally infested with Phytophthora sojae ranged from 11.7 to 52.0% at 140 days after transplanting. Independent of the pathotype diversity, 4 and 10 mM of the calcium compounds applied twice (prior to transplanting and 14 days after transplanting) significantly suppressed disease incidence and delayed onset. Ca(HCOO)2-A (Suicaru) was more effective than calcium nitrate for reducing disease incidence. In most cases, the calcium amendments increased plant height, number of nodes and pods, and seed yields, and reduced low-quality seeds. Scanning electron microscopy with fresh samples showed increased accumulation of calcium crystals around the cambium and xylem elements of soybean plants treated with 10-mM Ca(HCOO) 2-A and Ca(NO3)2. Mycelial penetration was inhibited at these sites. These results indicated that calcium-rich areas may be more resistant to invasion by P . sojae , and the calcium crystals may play an important role in calcium ion storage and its availability for those tissues to maintain long-term field resistance. © 2010 The American Phytopathological Society. Source


Ji H.C.,Laboratory of Plant Nutrition | Ji H.C.,South Korean National Institute of Animal Science | Lee H.B.,Laboratory of Plant Nutrition | Lee H.B.,South Korean National Institute of Animal Science | Yamakawa T.,Laboratory of Plant Nutrition
Journal of the Faculty of Agriculture, Kyushu University | Year: 2010

This study was carried out to develop the new colored waxy corn hybrids with high yield and functional characteristics using the domestic collected genetic resources. Botanical characteristics and antioxidant activities of the developed CNU (Chungnam National University) waxy corn hybrids were analyzed and evaluated for selection of superior hybrids with high yield including high table quality. Stem height of CNU19 hybrid among developed hybrids were higher as 242 cm and its ear height were also higher as 52 cm than check, Chalok 1. Tiller per plant of CNU19 was high as 1.5 compared to 0.8 of check Days to tasseling appeared as 74 days and ear length of CNU19 were longer than check, Chalok 1. Lodging and insect resistance of CNU19 was 2 and 3, respectively, stronger than other hybrids. Pericarp thickness of CNU19 in yellow waxy hybrids was thinner than 40 μm which was a selection criterion of edible waxy corn hybrid. Sugar content (Brix) of the developed CNU19 waxy com hybrid was comparatively lower than check In table quality, CNU12 and CNU19 hybrids were good than check in sugar content and tenderness. In functional analysis, 1,1-diphenyl-2-picryhydrazyl (DPPH) radical scavenging effect, xanthine oxidase (XO) activity and catalase activity by methanol extracts were comparatively appeared high in CNU19. CNU19 and CNU 153 hybrids from ethanol extracts showed also higher antioxidant activities. Source


Gan L.-J.,Laboratory of Plant Nutrition | Gan L.-J.,Chungnam National University | Wang X.-Y.,Laboratory of Plant Nutrition | Wang X.-Y.,Chungnam National University | And 11 more authors.
Journal of the Faculty of Agriculture, Kyushu University | Year: 2015

So far, there are lots of paper reported the nutritional composition of mature barley and de-hulled barley, but little research on premature barley. For the purpose of exploring nutritional potential of premature barley, we analyzed the nutritional status of premature green, mature yellow, and de-hulled barley grown in the Jeollabuk-Do Agricultural Research & Extension Services (Iksan, Korea). Compared to de-hulled and mature barley, premature barley contained higher amounts of lysine (41.46 mg g-1 protein), total essential amino acids (351.75 mg g-1 protein), vitamin C (0.93mg 100 g-1 DW), vitamin B2 (0.10mg 100g-1 DW), and vitamin B3 (2.16mg 100g-1 DW), and β-carotene (69.79μg 100g-1 DW) was only detected in premature barley. Statistically higher quantities of Na and K were present in premature barley compared to the other two grain-types (P ≤ 0.05), whereas mature barley contained the highest amount of P and Fe (P ≤ 0.05). All three grain-types contained similar levels of Ca and Cu. Mature barley contained the highest betaine and choline (49.44mg 100 g-1 DW and 34.61 mg 100g-1 DW, respectively). The results indicate that premature barley is nutritionally superior to de-hulled barley. Source

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