摘要:
在农业增产中,氮肥的充足与否起着决定性的作用。在我国广大面积的耕地上,氮肥来源主要靠粪便肥、厩肥、绿肥和部分的化学肥料,因此一般都感到氮肥不够充足。在提高农作物的产量上,如何增加氮肥肥源,便成为当前生产上的关键问题了。利用固氮细菌作为作物的生物氮肥肥源,是一个新的途径,由于固氮能力较强强的固氮细菌,大半是好气性的,嫌气性的固氮能力较低,因此,在旱地作物上应用还是较为适宜,
Abstract:
The object of these experiments was to test the effect on rice yields of the inoculation of rice fields with blue-green algae,which are powerful nitrogen-fixers.In our investigations,three cultured types were selected for trials:HB 686(Anabaena azotica),HB 678(Anabaena azotica f.a.)and HB 670(Anabaena variabilis vat.tenuis).In one series they were inoculated into the soil for pot- cultures,and in another into the soil of an experimental rice field,both having controls. The results of our experiments are:the pot-culture inoculated HB 678 showed on increase in yield of 23.74%,and with HB 670 the increase was 18.73%.In the field trials inoculation with HB 686 showed an increased yield of 24.08% and HB 678 and increase of 17.79%,compared with the control.
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