Effects of Microbial Fertilizer on Salt Reduction and Cotton Growth Response in Coastal Salted Cotton Field

doi:10.7668/hbnxb.20192530

Abstract

Abstract: The aim of this study was to explore the effect of applying microbial fertilizer on salt reduction and the response of cotton growth in coastal saline cotton field. The mild and moderate saline cotton fields in the coastal area of the Yellow River Delta were selected. Cotton field experiments were conducted with different kinds of biological products and different amounts of microbial fertilizer. Soil salinity, cotton plant height, SPAD value, canopy NDVI and other data were collected. The effect of microbial fertilizer on reducing salt in saline cotton field and its response to cotton growth were systematically analyzed. The results showed that different kinds of biological products had a certain effect on salt reduction, and the salt content in surface and underlayer, rhizosphere and between ridges decreased. In mildly saline cotton field, soil salt content decreased between 7.03% and 35.06%, plant height increased by 9.76% to 15.40%, SPAD value increased by 12.97% to 22.64%, and NDVI value increased by 12.58% to 19.85%. Microbial fertilizer treatment had the best effect. Soil salt content decreased by 6.18% -31.85%, plant height increased by 10.02% -17.12%, SPAD value increased by 13.67% -15.55%, and NDVI value increased by 9.22% -18.69% in moderate salinized cotton fields. The effect of microbial fertilizer on reducing salt was the most obvious. In general, the salt reduction and growth promotion effects of the application of microbial fertilizer were better than that of organic matter+beneficial microbial treatment, and better than that of commercial organic fertilizer treatment. The recommended application amount of microbial fertilizer was 1 500 kg/ha. This study proved that the application of microbial fertilizer in coastal saline cotton field had an obvious effect of reducing salt, and had a positive effect on the growth of cotton. The results provided a reference for the biological improvement of coastal saline farmland.

Key words: Microbial fertilizer, Soil salt content, Salted cotton fields, Cotton growth, Salt reduction effect, Biological improvement

CLC Number:

S144
S562.01

WANG Qiyao, ZHAO Gengxing, ZHAO Yongchang, YANG Jingwen, ZHANG Shuwei, LI Tao, LI Jianwei, PAN Deng, TU Qiang. Effects of Microbial Fertilizer on Salt Reduction and Cotton Growth Response in Coastal Salted Cotton Field[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(S1): 267-274. doi: 10.7668/hbnxb.20192530.

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