Effect of Sesbania cannabina Cultivation on Severe Salinity Soil Fertility Improvement

doi:10.11924/j.issn.1000-6850.casb15080103

Abstract

Abstract: In order to study the effect of Sesbania cannabina cultivation on severe salinity soil fertility improvement, four treatments were designed: (1) Sesbania cannabina cultivation (T); (2) Sesbania cannabina cultivation and diammonium phosphate applied at the rate of 450 kg/hm²(TA); (3) Sesbania cannabina cultivation and phosphogypsum applied at the rate of 2250 kg/hm²(TG); (4) without Sesbania cannabina cultivation (CK). The results showed that phosphogypsum application could significantly promote the growth of Sesbania cannabina (P<0.05). Compared with that of T and TA treatment, the biomass of the aboveground part and underground part of TG treatment increased 14.24%, 24.77% and 8.32%, 12.39%, respectively, and the improving effect of diammonium phosphate application on Sesbania cannabina cultivation was not significant. Sesbania cannabina cultivation could significantly decrease soil salt content, bulk density, and significantly increase available nitrogen, available potassium, dissolved organic C (DOC), macro-aggregate content, mean weight diameter (MWD) and total porosity (P<0.05), the improving effect of TG was the best. The correlation analysis showed that soil salinity, Na concentration, DOC and organic matter content played an important role in the regulation of salinity soil structure. The improving methods included decreasing soil salinity and Na concentration, and increasing DOC and organic matter content. Sesbania cannabina cultivation with phosphogypsum application was an efficient method to improve the fertility of severe salinity soil.

CLC Number:

S141.4

Xie Wenjun,Wang Jishi,Jin Xiangxu,Zhang Yanpeng,Wu Lanfang and Ouyang Zhu. Effect of Sesbania cannabina Cultivation on Severe Salinity Soil Fertility Improvement[J]. Chinese Agricultural Science Bulletin, 2016, 32(6): 119-123.

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