Welcome to visit Scientia Silvae Sinicae，Today is

Scientia Silvae Sinicae ›› 2019, Vol. 55 ›› Issue (1): 110-118.doi: 10.11707/j.1001-7488.20190113

• Scientific notes • Previous Articles     Next Articles

Effects of Mulching Management on Nutrient Contents, Enzyme Activities, and Microbial Biomass in the Soils of Moso Bamboo Forests

Wang Bo1, Li Qin1, Zhu Wei2, Chen Wenhai3, Zhu Hongliang4, Shen Quan5, Zhu Anming6, Zhao Jiancheng1   

  1. 1. Zhejiang Academy of Forestry Zhejiang Provincial Key Laboratory of Bamboo Research Bamboo Shoot Engineering and Technology Research Center of National Forestry and Grassland Administration Hangzhou 310023;
    2. Huzhou Forestry Bureau of Zhejiang Huzhou 313000;
    3. Forestry and Fruit Technical Service Station of Agricultural Economics Bureau of Haining Haining 314400;
    4. Shaoxing Environment and Greening Station of Zhejiang Shaoxing 312000;
    5. Changxing Forestry Bureau of Zhejiang Changxing 313100;
    6. Research Institute of Forestry Policy and Information, Chinese Academy of Forestry Beijing 100091
  • Received:2017-06-20 Revised:2018-10-10 Online:2019-01-25 Published:2019-01-06

PDF (PC)

439

Abstract: [Objective] This study aims to investigate the causes for degradation of Phyllostachys edulis forest under mulching management (straw + bamboo leaf + rice chaff), in order to provide a theoretical basis for the restoration of degraded P. edulis forest.[Method] Bamboo stands with different mulching ages (1, 2, 3 a) and non-mulching (Control) stands were selected, soil pH value, nutrient contents, enzyme activities and microbial biomass in 0-40 cm soil layer were measured, respectively.[Result] With the increase of mulching years, the soil pH value gradually reduced, i.e. soil acidification. The content of soil organic matters increased with the increase of mulching years. Soil total nitrogen (TN), total phosphorus (TP), total potassium (TK) content increased gradually, and they were significantly higher than that in non-mulching stand (P<0.05). Contents of soil available nutrients (available N, available P, available K) increased and followed by a decrease, and peaked in mulching 1 a stand. Contents of soil available nutrients in mulching 1 a stand were significantly higher than that in the non-mulching stand (P<0.05), while they were significantly lower in mulching 3 a stand than that in the non-mulching stand (P<0.05). With the increase of mulching years, soil C/N and N/P gradually increased, N/K increased first and followed by a decrease, while P/K gradually decreased. Urease and sucrase activities increased first and followed by a decrease with the increase of mulching years, and peaked in mulching 1 a stand. While protease, catalase and acid phosphatase activities gradually decreased. Soil microbial biomass increased first and followed by a decrease with the increase of mulching years, and it was the largest in mulching 1 a stand. Bacteria and actinomyces biomasses showed the same variation tendency as the microbial biomass, while fungi biomass gradually increased. Aerobic bacteria biomass increased first and followed by a decrease, and it was significantly lower in mulching 3 a stand than that in the non-mulching stand (P<0.05). Ratio of fungi biomass and bacteria biomass (F/B) showed a decrease first and followed by an increase, and there was no significant difference in mulching 3 a stand and the non-mulching stand (P>0.05).[Conclusion] Compared with mulching 1 a Moso bamboo forest, long term mulching management may lead to soil acidification, the imbalance of nutrients proportions, decreasing of enzyme activities and change of soil microbial flora, resulting in soil deterioration and the degradation of P. edulis forests. Therefore, rotated mulching management (mulching 1 a and then recuperating 1 a) should be recommended in practice. In addition, mulching materials should be removed in time at shooting period to reduce the amount of residue, and the rational application of chemical fertilizer should also be considered.

Key words: Phyllostachys edulis, mulching, nutrient, enzyme activity, microbial biomass

CLC Number: