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2. Agriculture on the Loess Plateau

Author

An, Ping, Inoue, Tomoe, Zheng, Mingqing, Eneji, A. Egrinya, Inanaga, Shinobu, Iwasa, Yoh, Series editor, Tsunekawa, Atsushi, editor, Liu, Guobin, editor, Yamanaka, Norikazu, editor, and Du, Sheng, editor

Published
2014
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14. Chlorinated alkaloids in Menispermum dauricum DC. root culture

Author

Sugimoto, Yukihiro, Babiker, Hind A. A., Saisho, Tomoki, Furumoto, Toshio, Inanaga, Shinobu, and Kato, Masako

Subjects
Chemistry, Organic -- Research, Alkaloids -- Physiological aspects, Chlorination -- Physiological aspects, Bacteria -- Physiological aspects, Biological sciences, Chemistry
Abstract

Research has been conducted on the Menispermum dauricum root culture. The (super)36 Cl using feeding experiments demonstrate that this root culture produces alkaloids that contain chlorine.

Published
2001

18. Differences in ecological and allelopathic traits among Alternanthera philoxeroides populations

Author

Yongqing Ma, Shengpeng Zuo, and Inanaga Shinobu

Subjects
biology, Ecotype, Ecology, Aquatic ecosystem, Alligator, food and beverages, biology.organism_classification, Plant ecology, Agronomy, Alternanthera philoxeroides, biology.animal, Aquatic plant, Botany, Weed, Agronomy and Crop Science, Allelopathy
Abstract

Based on a field investigation and laboratory trials,this study compared the invasive ecology of aquatic and terrestrial alligator weed (Alternanthera philoxeroides G.) ecotypes. The aquatic ecotype showed a stronger eco-adaptation than the terrestrial ecotype. Alligator weed performed well in wetland and riparian habitats, where it was so competitive that only one-tothree other plant types grew successfully in its company. In contrast, it exhibited poor growth in upland fields and parks, where the terrestrial ecotype was dominated by 6‐11 other alien plant species.The aquatic ecotype exhibited significantly greater growth inhibition of Microcystis aeruginosa. The ecotypes differed in their pattern of allelopathic inhibition of water blooms.The allelopathic effect of the aquatic ecotype persisted for a period exceeding 20 days, whereas the terrestrial ecotype’s allelopathic effect subsided in

Published
2012

19. Ecological adaptation of weed biodiversity to the allelopathic rank of the stubble of different wheat genotypes in a maize field

Author

Shengpeng Zuo, Yongqing Ma, and Inanaga Shinobu

Subjects
education.field_of_study, Setaria viridis, fungi, Population, Biodiversity, food and beverages, respiratory system, Biology, Weed control, biology.organism_classification, Spatial heterogeneity, Agronomy, parasitic diseases, Monoculture, education, Weed, Agronomy and Crop Science, Allelopathy
Abstract

The objective of this study was to integrate allelopathic bioassay and point sampling methods to investigate the allelopathic rank of the stubble of different wheat genotypes and its effect on weed biodiversity in a maize field. The study consisted of 17 wheat stubble treatments derived from ten wheat genotypes planted individually (monoculture) or in pairs (mixed culture). The maize was planted in the plots immediately following the wheat harvest and the number of weed species, total weed number, weed density, weed height, and weed cover were determined 50 days later. The results indicate a significant rank effect of allelopathic potential in the stubble of the different wheat genotypes. There was a stronger allelopathic effect from the straw in the mixed-culture treatments compared to the monoculture treatments. Acalypha australis and Setaria viridis were the dominant weed species in the maize fields. The regression analysis shows that the weed biodiversity indices were significantly related to the allelopathic rank. The allelopathic potential exhibited spatial heterogeneity in all the scales, which would trigger resource heterogeneity and change the microhabitat conditions. Therefore, weed biodiversity would respond spatially and biologically to the heterogeneous distribution of allelochemicals from the wheat stubble. The allelopathic rank of the wheat stubble would lead to changes in weed biodiversity by regulating the ecological niche of the weed population. The weeds showed resistance or an adaptive response to exterior pressure, including allelopathic pressure. This study on the effect of allelopathic potential on weed biodiversity provides a solid theoretical basis for sustainable weed management of agro-ecosystems.

Published
2008

20. Wheat Yield Improvement in Eroded Semi-Arid Areas of China

Author

Shan Lun, Keren Rami, Deng Xiping, and Inanaga Shinobu

Subjects
Irrigation, Ecology, business.industry, Agroforestry, 05 social sciences, Drought tolerance, 04 agricultural and veterinary sciences, Water conservation, Agronomy, Agriculture, 0502 economics and business, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, Environmental science, Animal Science and Zoology, 050202 agricultural economics & policy, Agricultural productivity, business, Soil conservation, Agronomy and Crop Science, Cropping, Environmental quality
Abstract

The greatest fear from global climate change is drought, and water is the most important factor influencing wheat growth. Soil and water conservation are, therefore, key requirements for sustaining productivity and environmental quality in semi-arid cropping systems. Great attention has been paid to the management of, demand for, and more efficient use of water. The comprehensive technical strategies reviewed in this paper include conserving water to combine both increased agricultural productivity and resource conservation; enquiries into how wheat plants respond to drought through morphological, physiological and metabolic modifications that occur in all plant organs; breeding for drought tolerance where there is a delineated stress environment and genotype × environment interactions are stable; and effective conservation of rainfall and high efficiency of use. Valuable techniques such as conservation tillage, mulch cultivation, limited irrigation, introduction of drought-tolerant varieties and rotation systems can be adjusted to local agricultural practices.

Published
2003

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