保水剂配施微生物菌剂对旱作大麦饲草产量、品质及土壤养分的影响

doi:10.12190/j.issn.2096-1197.2025.04.08

Abstract

Abstract: 【Objective】To analyze the effects of combined application of water-retaining agent and microbial agent on forage yield,quality,and soil nutrients of dryland barley in the semi-arid region of Inner Mongolia,thereby providing a theoretical foundation for efficient forage production. 【Methods】ield experiments were conducted in Shangdu County,Inner Mongolia,from 2023 to 2024 using a randomized block design. Four treatments were established：microbial agent alone（A）,water-retaining agent alone（B）,combined application of water-retaining agent and microbial agent（AB）,and a control without the application of a water-retaining agent and microbial agent（CK）,to analyze the changes in forage yield,quality,and soil nutrients of dryland barley under different treatments.【Results】Fresh grass yield and hay yields of dryland barley ranked as AB>A>B>CK. Two-year data showed that,compared with CK,the AB treatment increased crude protein content by 2.65-3.35 percentage points,crude fat content by 6.67-8.90 percentage points,and relative feed value by 6.21%-42.94%. All treatments improved soil nutrients to varying degrees. Compared with CK,A treatment,and B treatment,the AB treatment increased soil organic matter content by 5.82%-28.40%,total nitrogen content by 2.84%-43.72%,total phosphorus content by 2.63%-76.11%,total potassium content by -2.69%-14.17%,available nitrogen content by 11.83%-60.96%,available phosphorus content by 7.89%-31.88%,and available potassium content by 4.41%-20.34%. Correlation analysis indicated that soil organic matter,total nitrogen,total potassium,and available potassium were the main factors influencing hay yield of dryland barley,whereas soil total nitrogen,total potassium,and available nitrogen content were the main factors affecting forage quality of dryland barley.【Conclusion】Combined application of water-retaining agent and microbial agent enhances forage yield and quality of dryland barley and improves soil nutrients,warranting further promotion and validation in the semi-arid region of Inner Mongolia.

Key words: Water-retaining agent, Microbial agent, Dryland barley, Forage quality, Soil nutrients

CLC Number:

S512.3

QU Jiahui, Batu, XU Guangxiang, WEN Ruiqiang, PENG Xiaoguang, LYU Ersuo, MA Yu, LI Tao, LIU Zhiping. Effects of combined application of water-retaining agent and microbial agent on forage yield,quality,and soil nutrients of dryland barley[J].Journal of Northern Agriculture, 2025, 53(4): 88-98.

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Effects of combined application of water-retaining agent and microbial agent on forage yield,quality,and soil nutrients of dryland barley

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