| 摘要: |
| 在盆栽试验中,用15N15还原法测定稻株总氮,其中1.09%来自接种的固氮蓝藻。蓝藻当季固定的氮素只有11.93%被利用。接种蓝藻增加稻田的氮量为16.3kg·hm-2。实验室条件下按固氮量推算,自然水稻田土壤生物固氮量为14.2kg·hm-2,植株总氮的16.8%来自生物固氮;接种蓝藻的稻田土生物固氮量为31.2kg·hm-2,比自然稻田多固氮17kg·hm-2,植株总氮的25.8%来自生物固氮。测定北京稻田土固氮酶还原 C22H2与 N2的转换比在2.71～3.71:1之间。 |
| 关键词: 15N2还原法 还原 C2H2转换比 固氮贡献 |
| DOI： |
| 投稿时间：1993-12-03 |
| 基金项目: |
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| Abstract: |
| The paper applied the method of C_2H_2/N_2 reduction and th acetylene reduction.The result in pot experiment showed 1.09% of the total nitrogen content in rice plant was from nitrogen-fixation of algaeinoculated.The utilization ratio of the nitrogen fixed by algae per crop was only 11.93%.The capacity of N_2-fixing in rice field raised about 16.3 kg'hm~(-2),Due to the algae inoculation;In bottle exper- iment,It that the amount of nitrogen fxed by microorganisms in the rice field of Beijing was estimated as ... |
| Key words: method of 15SN2 reduction conversion ratio of C2H2/N2 reducing biological nitrogen fixing contribution |
