Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (9): 1918-1927.DOI: 10.3969/j.issn.1000-2561.2020.09.028

• Agricultural Ecology & Environmental Protection • Previous Articles     Next Articles

Growth and Soil Fertility Characteristics of Rubber Seedlings in Different Biogas Slurry Irrigation

SUN Fengxia1,WANG Xinyao2,TANG Peng1,WANG Xu2,3,*(),WU Shuhua1,LI Chao1,CHENG Yikang1,REN Haotian2   

  1. 1. College of Forestry, Hainan University, Haikou, Hainan 570228, China
    2. College of Ecology and Environment, Hainan University, Haikou, Hainan 570228, China
    3. Danzhou Investigation & Experiment Station of Tropical Crops, Ministry of Agriculture and Rural Affairs, Danzhou, Hainan 571737, China
  • Received:2019-11-13 Revised:2020-03-06 Online:2020-09-25 Published:2020-10-16
  • Contact: WANG Xu

Abstract:

The growth of rubber seedlings and the main soil fertility factors were measured by the soil culture method with seven different biogas slurry treatments to clarify the growth status and soil fertility characteristics of rubber seedlings in different quantity of biogas slurry irrigation and to guide its fertilization scientifically. The total amount of biogas liquid irrigation was 0 mL (T0), 471 mL (T1), 942 mL (T2), 1413 mL (T3), 1884 mL (T4), 2355 mL (T5) and 2826 mL (T6) respectively. Biogas slurry irrigation was beneficial to the growth of rubber seedlings with the order of quality index (QI) of rubber seedlings in different treatments T4 (1884 mL)>T3 (1413 mL), T5 (2355 mL)>T2 (942 mL)>T0 (0 mL), T1 (471 mL)>T6 (2826 mL). The plant height and ground diameter of treatment T4 were better, and the survival rate of the seedlings was higher after planting. Biogas slurry irrigation was beneficial to the increase of soil nutrient content and the activities of urease, catalase, acid phosphatase and polyphenol oxidase. Using principal component analysis and membership function to calculate the comprehensive index of soil quality in the experimental group, the comprehensive index of soil quality in the experimental group was T3 (0.933)>T5 (0.906)>T4 (0.855)>T2 (0.826)>T6 (0.794)>T1 (0.742). The results showed that the chemical properties of soil could be improved by biogas slurry irrigation, but the quality index of seedlings might be decreased by over irrigation, and the optimal irrigation amount was when the biogas slurry was 1413-1884 mL.

Key words: amount of biogas slurry, rubber seedlings, growth parameter, soil fertility

CLC Number: