| 白浆土大豆结瘤及其固氮状况 |
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| 引用本文： | 汤树德.白浆土大豆结瘤及其固氮状况[J].土壤学报,1979,16(1):9-16. |
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| 作者姓名： | 汤树德 |
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| 作者单位： | 黑龙江农垦大学 |
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| 摘 要： | 黑龙江省是我国大豆主要产区,在国营农牧场中大面积机械化生产条件下,大豆的种植面积约占耕地面积的三分之一左右。一般认为,大豆与根瘤菌的共生固氮作用所固定的氮,能提供大豆整个生育过程中对氮素需要量的二分之一到三分之二。然而,在大田生产实践中,由于土壤类型、肥力水平、气候条件、前作、品种、施肥等因素的综合影响,使大豆在田间的共生固氮效率产生了很大的差异。
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STUDY ON THE NODULATION AND NITROGEN FIXATION OF SOYBEAN IN LESSIVE SOILS |
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| Tang Shu-de.STUDY ON THE NODULATION AND NITROGEN FIXATION OF SOYBEAN IN LESSIVE SOILS[J].Acta Pedologica Sinica,1979,16(1):9-16. |
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| Authors: | Tang Shu-de |
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| Institution: | Heilongjiang Agrioultural College |
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| Abstract: | The results of experiments and investigations on the symbiotic nitrogen fixation of soybeaa in lessive region in Heilongjiang Province are summarized as follows:1.In symbiotic system,the soybean modulation showed a high positive correlation with the plant growth.Under different ecological conditions,the divergency in the correlation increased with the increasing rate of nodulation.2.In the early stage of growth,nitrogen fertilizer showed sensitive inhibition effect on the nodulation for 20 soybean varieties,whereas phosphate fertilizer produced favorable effect on the growth,nodulation and the rate of nitrogen fixation of soybean.The application of phosphate fertilizer together with molybdate showed more favorable effect on the symbiotic system.3.The intensive decline of the plant growth,the rate of nodulation and the yield of the soybean were resulted by the continuous cropping of this crop.Applicaof phosphate and molybdate fertilizers,although improved the rate of nodulation and nitrogen fixation,could not correct the unfavourable effect resulted from continuous cropping.4.Under the condition of mechanized cultivation,a significant variation in the rate of natural nodulation of soybean appeared.In some fields,even no any symbiotic fization of nitrogen took place,and in a few fields,the rate of nitrogen fixation reaehed 50 per cent.The highest amount of fined nitrogen was about 0.33 kg/ha,with an average figure of 0.18 kg/ha from 15 scattered locations. |
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