浅耕栽培と施肥法または異なる作付体系の組合せがダイズシストセンチュウ(Heterodera glycines)の卵密度推移とダイズの生育に及ぼす影響

日本作物学会紀事

臼木 一英²  山本 泰由¹  田澤 純子¹  三浦 重典¹ 

[1] 中央農業総合研究センター;北海道農業研究センター

关键词: Red clover;    アカクローバ;    Crotalaria;    クロタラリア;    Shallow tillage;    浅耕;    Soybean;    ダイズ;    Soybean cyst nematode;    ダイズシストセンチュウ;    Natural enemy;    天敵微生物;    Corn;    トウモロコシ;   

DOI  :  10.1626/jcs.77.33

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Recently, damages by soybean cyst nematode (SCN) are increasing in Japan, due to continuous cultivation of soybean, and the establishment of the culture method to control SCN is awaited. In this research, field experiments were conducted over four years. Various tillage methods were combined with fertilizers (chemical fertilizer, compost of cattle droppings and calcium cyanamide) and crop rotation with non-host and trap crops (corn, crotalaria, and red clover) to investigate their effects on the population dynamics of SCN and soybean yield. Shallow tilling (plowing depth : 5 cm) decreased the SCN population to a lower level than conventional tillage (plowing depth : 15 cm). It was attributed to fewer disturbances of soil and the presence of larger number of natural enemy microorganisms in the shallow tillage treatment. The effects of fertilizers on SCN were not clear. The effect of the preceding crop plant was greater than that of the tilling method. Corn cultivation before soybean increased SCN population drastically under the conventional tillage, but not under the shallow tillage. Suppressive effects of crotalaria and red clover on SCN remained during the following soybean cultivation, especially red clover cultivation with the shallow tillage kept SCN population under 10 eggs/g of dry soil. Soybean yield was increased by the application of calcium cyanamide and cattle manure. Consequently, it was suggested that the shallow tillage would be advantageous to decrease the SCN population, and to promote the suppressive effects of non-host or trap crops, such as corn, crotalaria, and red clover.

【 授权许可】

Unknown