施用有机肥对土默川平原盐碱土土壤盐分及养分特征的影响

doi:10.3969/j.issn.2096-1197.2019.06.06

Abstract

Abstract: In order to explore the effects of different application rates of organic fertilizer on the salinity and nutrient characteristics of saline-alkali soil in Tumochuan Plain,the saline-alkali soil was studied in Togtoh Scientific Research Base of Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences.The effects of different application rates of organic fertilizer on soil salinity,pH,desalination rate,organic matter,total nitrogen,alkali hydrolyzable nitrogen,and available phosphorus in saline-alkali soil,and their correlations were studied.The results showed that：when the application rate of organic fertilizer was 36 t/hm² and 54 t/hm²,the soil salinity and pH decreased significantly.The desalination rates of soil were 12.63% and 11.77%,respectively.With the increase of the amount of organic fertilizer,the content of the soil organic matter increased,and the contents of the total nitrogen,the alkali hydrolyzable nitrogen and the available phosphorus increased at first and then decreased.Among them,the application rate of organic fertilizer 72 t/hm² increased the content of the soil organic matter in 0-20 cm soil layer most significantly,which was 35.40%-38.73% higher than that of the control.There were significant differences in the total nitrogen,the alkali-hydrolyzable nitrogen and the available phosphorus in 0-20 cm soil layer treated with 54 t/hm²,which were 20.62%-97.98%,16.81%-20.27%,and 57.50%-69.93% higher than those of the control,respectively.The application of organic fertilizer affected the soil salinity and pH,by affecting the soil organic matter,the total nitrogen and other chemical indexes,in which the soil pH was significantly or very significantly negatively correlated with the organic matter,the total nitrogen,the alkali-hydrolyzable nitrogen and the available phosphorus.The soil total salt was significantly negatively correlated with the total nitrogen,the alkali hydrolyzable nitrogen and the available phosphorus.

Key words: Organic fertilizer, Soil salinity, Soil nutrients, Saline-alkali soil, Tumochuan Plain

CLC Number:

S154

ZHANG Yazhen, LI Yuejin, JING Yupeng, LI Xiuping, SHI Pei, LI Yanfang, LU Xudong, LIAN Heifei, WANG Qingmeng. Effect of increasing amounts of organic fertilizer on the soil salinity and nutrient characteristics of saline-alkaline soil in Tumochuan Plain[J].Journal of Northern Agriculture, 2019, 47(6): 34-41.

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Effect of increasing amounts of organic fertilizer on the soil salinity and nutrient characteristics of saline-alkaline soil in Tumochuan Plain

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