| 柑桔园的间作绿肥—印度豇豆根瘤的固氮活性及固氮量评价 |
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| 引用本文： | 黄维南,蔡克强,吕荣欣,吴以德,蔡龙祥.柑桔园的间作绿肥—印度豇豆根瘤的固氮活性及固氮量评价[J].福建农林大学学报(自然科学版),1983(4). |
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| 作者姓名： | 黄维南 蔡克强 吕荣欣 吴以德 蔡龙祥 |
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| 作者单位： | 福建省亚热带植物研究所，福建省亚热带植物研究所，福建省亚热带植物研究所，福建省亚热带植物研究所，福建省亚热带植物研究所 |
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| 摘 要： | 印度豇豆根瘤发达,在我们的试验条件下,平均每株植物的根瘤粒数可达66个,一般密布于侧根上部。主根上的根瘤较大,但数量少。侧根上的根瘤不仅数量多于主根上的,而且其固氮活性也较高。印度豇豆生育早期根瘤的固氮活性较低,分枝盛期根瘤数量和固氮活性都显著增加,开花期,特别是开花盛期固氮活性最高,结荚后固氮活性明显下降。经测算,每亩柑桔园中如套种30815株印度豇豆,从5月11日(分枝初期)至7月8日(第一次割青)的两个月期间内,每亩印度豇豆根瘤固定的氮素约为5.91公斤(折合硫酸铵27.8公斤)。印度豇豆作为果园复盖绿肥,每年可割青2～3次。试验结果表明,印度豇豆根瘤发达,固氮能力强,抗逆性大,适应性广,生长迅速,枝叶茂盛,是新垦果园改良土壤的优良先锋作物。
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STUDIES ON THE NITROGEN FIXATION OF VIGNA DOLICBOIDES BAKER-AN IMPORTANT COVER CROP IN THE CITRUS ORCHARDS |
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| Abstract: | Vigna dolicboides Baker is an annual trailing leguminous plant, which develops a vigorous root system. The results of our experiments indicated that lateral roots near the soil surface developed abundant nodules housing Rhizobium bacteria that fixed atmospheric nitrogen. The average number of nodules per plant was 66. Both the number of nodules and the nitrogen fixing activity of the lateral roots were higher than that of the taproot. The number of nodules and nitrogen fixing activity were lower in the early stage of growth and markedly increased in fully branching stage. Nitrogen fixing activity rose to a maximum in the fully flowering stage and declined sharply during pod-filling. Approximately 5.91 kg nitrogen per mu(88.65 kg per ha) fixed by nodulated Vigna dolicboides during the growth period (May 11th to July 8th) under our experimental conditions. The results of this preliminary study show that nodulated Vigna dolicboides is a leguminous plant with high nitrogen fixing activity, highly resistant to diseases. and greatly adaptable to our locality It grows rapidly and makes an ideal intercropping grecn manurc plant in the orchard |
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