Effects of mowing modes on biomass, crude protein and crude fat contents of <i>Broussonetia papyrifera</i> in karst area

Zhao Qingxia; Xia Yufang

doi:10.12171/j.1000-1522.20210425

Journal of Beijing Forestry University > 2023 > 45(6): 62-68. > DOI: 10.12171/j.1000-1522.20210425

Zhao Qingxia, Xia Yufang. Effects of mowing modes on biomass, crude protein and crude fat contents of Broussonetia papyrifera in karst area[J]. Journal of Beijing Forestry University, 2023, 45(6): 62-68. DOI: 10.12171/j.1000-1522.20210425

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Effects of mowing modes on biomass, crude protein and crude fat contents of Broussonetia papyrifera in karst area

Zhao Qingxia,
Xia Yufang^,

Institute of New Rural Development, Guizhou University, Guiyang 550025, Guizhou, China

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Received Date: October 24, 2021
Revised Date: January 25, 2022
Accepted Date: March 28, 2023
Available Online: March 30, 2023
Published Date: June 24, 2023

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Abstract

Abstract

Objective Broussonetia papyrifera is an important ecological and economic species, which is widely planted in karst area. However, at present, research on the impact of mowing patterns on its yield and quality is seldom, resulting in low resource utilization, low yield and quality of B. papyrifera stand. Therefore, this research studied the effects of different mowing frequencies and stubble heights on the yield and nutrient contents of B. papyrifera, in order to determine the optimal mowing modes and guide the harvesting and utilization of B. papyrifera.
Method Research objects were two-year-old B. papyrifera in Zhenfeng County, Guizhou Province of southwestern China. Three mowing frequencies (cutting 3 times, 4 times and 5 times a year) and three stubble heights (stubble 0 cm, 15 cm and 30 cm) were randomly set up. The number of sprouting, biomass of harvested branches and leaves, crude protein and crude fat contents among different treatments were studied.
Result The number of resprouting of B. papyrifera under 4 and 5 time mowing a year was significantly higher than 3 times. With the increase of mowing times and stubble heights, stem to leaf ratio decreased gradually. The biomass, crude protein were not affected by mowing frequency. However, stubble heights significantly affected biomass, and showed that the biomass of stubble 30 cm was the highest (2.63 t/ha). The crude fat content of neat mowing was significantly higher than that of stubble 15 cm and 30 cm.
Conclusion There is little difference in yield and quality of B. papyrifera among 3−5 times mowing a year. Yield with stubble of 30 cm is the highest, but the crude fat content decreases slightly. Therefore, it is recommended that mowing 3−4 times a year and stubble height of 30 cm for harvesting and utilization in B. papyrifera forage forest.
- Broussonetia papyrifera,
- mowing frequency,
- stubble height,
- biomass,
- crude protein,
- crude fat

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References

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Effects of mowing modes on biomass, crude protein and crude fat contents of Broussonetia papyrifera in karst area

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