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Cultivation Experiments of Energy Plant Helianthus tubrosus in Saline-Alkali Area of Songnen Plain

SHEN Guang,XU Hai-jun,ZHOU Lin,YU Zhi-min,LYU Pin(Natural Resources and Ecology Institute of Heilongjiang Academy of Sciences/National and Provincial Joint Engineering Laboratory of Wetlands and Ecological Conservation,Harbin,Heilongjiang 150040)  
To explore the development prospect of energy plant Helianthus tuberosus in saline-alkali area,two test materials-cultivated and wild Helianthus tuberosus were cultivated in Songnen Plain for experiments and study,which include treatments of fertilization,mowing,heavy saline-alkali stress and soils with different plowing years.The results showed that the two species both could grow and propagate normally in moderate saline-alkali land.Fertilization and mowing were beneficial for growing of Helianthus tuberosus.Heavy saline-alkali stress would decrease emergency rate of Helianthus tuberosusseedling.The wild species showed better resistance under heavy saline-alkali stress.The yield of cultivated species could reach more than 30 000 kg·hm-2 in moderate saline-alkali land.In conclusion,Helianthus tuberosus was an excellent energy plant fitting for cultivating in Songnen Plain.
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