Abstract The effect of different rice-based crop rotation sequences on the population densities of Meloidogyne graminicola and on the yield of rice was evaluated in a microplot experiment under lowland rice field conditions. Ten treatments of cropping sequences were grown in four successive growing seasons: continuous growing of the susceptible rice cultivar Thihtatyin (rice-rice-rice-rice), four treatments of 1- season crop rotation sequences (rice-rice-chickpea-rice, rice-rice-black gram-rice, rice-rice-soybean-rice, rice-rice-cowpea-rice), and five treatments of 2-season crop rotation sequences (groundnut-rice-chickpea-rice, green gram-rice-black gram-rice, cowpea-rice-soybean-rice, sesame-rice-cowpea-rice, sunflower-rice-sesame-rice). Population densities of M. graminicola recovered from the rice plants and the nematode multiplication factors (Mf) in the soil in the continuous rice cropping sequence (rice-rice-rice-rice) was the highest among the ten cropping sequences. Lowest nematode Mf in the soil was observed in the 2-season crop rotation sequence sunflower-rice-sesame-rice and the highest was observed in the 1-season crop rotation sequence rice-rice-cowpea-rice among the nine crop rotation sequences. Highest rice yield was obtained in the 2-season crop rotation sequences green gram-rice-black gram-rice, sesame-rice-cowpea-rice and sunflower-rice-sesame-rice, which were about 2 times higher compared with the 1-season crop rotation sequences and about 3 times higher compared with the continuous rice cropping sequence.

中文翻译：

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作物轮作测序，以最大限度地减少由水稻根结线虫根结线虫引起的缅甸夏季灌溉低地水稻的产量损失

摘要 在低地稻田条件下的微区试验中，评估了不同水稻轮作序列对禾本科根结线虫种群密度和水稻产量的影响。在连续四个生长季节种植 10 种轮作序列处理：感病水稻品种 Thihtatyin（水稻-水稻-水稻-水稻）的连续生长、1 季轮作序列（水稻-水稻-鹰嘴豆-水稻、水稻）的 4 个处理-水稻-黑克-水稻、水稻-水稻-大豆-水稻、水稻-水稻-豇豆-水稻）和 2 季轮作序列的 5 个处理（花生-水稻-鹰嘴豆-水稻、绿克-水稻-黑克-米、豇豆-大米-大豆-大米、芝麻-大米-豇豆-大米、向日葵-大米-芝麻-大米）。M的人口密度。水稻连作序列（水稻-水稻-水稻-水稻）中从水稻植株中回收的禾本科线虫和线虫增殖因子（Mf）在10个种植序列中最高。在9个轮作序列中，土壤中线虫Mf最低的是2季轮作序列向日葵-水稻-芝麻-水稻，1季轮作序列水稻-水稻-豇豆-水稻最高。两季轮作序列绿克-水稻-黑克-水稻、芝麻-水稻-豇豆-水稻和葵花-水稻-芝麻-水稻的水稻产量最高，比1-水稻高出约2倍。季作物轮作序列与水稻连作序列相比高出约 3 倍。