Influence of ridges for planting sweet potato on symbiotic ecological factors, photosynthetic abilities and population yield in relay intercropping system

  • Changwen LYU Southwest University, College of Agronomy and Biotechnology, Beibei, Chongqing 400715
  • Daobin TANG Southwest University, College of Agronomy and Biotechnology, Beibei, Chongqing 400715; Key Laboratory of Biology and Genetic Improvement for Tuber and Root Crops in Chongqing, Beibei, Chongqing 400715
  • Kai ZHANG Southwest University, College of Agronomy and Biotechnology, Beibei, Chongqing 400715; Key Laboratory of Biology and Genetic Improvement for Tuber and Root Crops in Chongqing, Beibei, Chongqing 400715
  • Jichun WANG Southwest University, College of Agronomy and Biotechnology, Beibei, Chongqing 400715; Key Laboratory of Biology and Genetic Improvement for Tuber and Root Crops in Chongqing, Beibei, Chongqing 400715
Keywords: environmental factors; land equivalent ratio; relay intercropping; ridging type; sweet potato; symbiotic period


Sweet potato (Ipomoea batatas L.) relay intercropping with maize exposes sweet potato to weak levels of sunlight due to the shadow maize creates during the symbiotic period. The insufficient light accordingly causes slow growth and development of vines and leaves of sweet potato in its early stage. The planting density and row direction of maize, the width of the intercropping strip, and the lodging type of sweet potato may form various photo conditions that influence sweet potato. The objective of this experiment was to research the effects of different ridging types on sweet potato and to elucidate the mechanisms of ecological conditions, photosynthetic physiology and intercropping benefits. The results indicated that, contrast to the one wide-ridge with planting two rows of sweet potato and two narrow ridges with planting two rows, mound planting was more superior in many aspects. Through mound planting sweet potato showed a larger range of temperature in air and soil, higher net photosynthetic rate, more active enzymes related with photosynthesis, and more benefits of relay intercropping.


Metrics Loading ...


Bao SD (2000). Agricultural chemistry analysis of soil. Beijing: China Agriculture Press, pp 263-270.

Beets WC (1982). Multiple cropping and tropical farming system. Colorado, USA: Grower. London, Britain and West views press.

Causse M, Rocher JP, Pelleschi S, Barrière Y, de Vienne D, Prioul JL (1995). Sucrose-phosphate synthase: an enzyme with heterotic activity correlated with maize growth. Crop Science 35(4):995-1001.

Clawson DL (1985). Harvest security and intraspecific diversity in traditional tropical agriculture. Economic Botany 39(1):56-67.

Coll L, Cerrudo A, Rizzalli R, Monzon JP, Andrade FH (2012). Capture and use of water and radiation in summer intercrops in the south-east Pampas of Argentina. Field Crops Research 134:105-113.

Cui M, Wang YB, Bai XK (1997). Study on different types of intercropping strips with summer maize and sweet potato. Maize Science 5(4):62-64.

Gliessman SR (1985). Agro: ecological processes in sustainable agriculture. Chelsea, ML, USA: Sleeping Bear Press.

Guo BL, Yang JX, Lu RQ, Wu Y, Guo J, Li XY (2007). Effects of shade treatment on the growth and photosynthesis characteristics of Euonymus fortune. Acta Horticulturate Sinica 34(4):1033-1036.

Huang YM, Chen TY, Li YQ (2011). Benefit study on intercropping patterns of maize and sweet potato. Journal of Guangxi Agriculture 26(6):16-19.

Ishimaru K, Hirotsu N, Kashiwagi T, Madoka Y, Nagasuga K, Ono K, Ohsugi R (2008). Overexpression of a maize SPS gene improves yield characters of potato under field conditions. Plant Production Science 11(1):104-107.

Jiang D, Lu Q, Weng X, Zheng B, Xi H (2001). Role of key enzymes for photosynthesis in the diurnal changes of photosynthetic rate in rice. Acta Agronomica Sinica 27(4):301-307.

Jiang DA, Weng XY, Lu Q, Zheng B (2001). Effect of light and dark treatments on photosynthetic key enzymes in rice. Journal of Zhejiang University (Agriculture and Life Sciences) 27(4):355-360.

Li CX (2011). Study on correlation between major photosynthetic properties and characteristics related to yield and quality of potato. Northeast Agricultural University. Ph. D thesis. pp 27-28.

Li YQ (1995). Study on mechanism of increase in output of mound planting sweet potato interplanting with maize. Tropical and Subtropical Soil Science 4(4):207-210.

Liu CW, Wang Q, Liu QL, Guan XK, Yang Y, Zhang EH (2013). Effect of stubble-standing mode on the grain yield and water use efficiency of wheat and maize in w heat/maize intercropping system. Journal of Applied Ecology 24(2):438-443.

Liu GY, Liang J, Wei M (2011). Photoinhibition and recovery of rice leaf from shadow to high light. Journal of Southwest China Normal University (Natural Science Edition) 36(5):156-158.

Liu XZ, Zhang YJ, Du HL (2004). Effects of moisture-fertilizer interaction on the yields of maize and soybean under the condition of inter-cropping. Chinese Journal of Eco-Agriculture 12(3):75-77.

Liu YH, Zhang LF (1994). Essential and application analysis of land equivalent ratio. Farming System and Cultivation 4:64.

Ma DF (2013). Thought about some problems of sweet potato industrial development in China. Agriculture Engineering Technology (Agricultural Product Processing Industry) 2013(11):21-24.

Mead R, Willey RW (1980). The concept of a land equivalent ratio and advantages in yields from intercropping. Experimental Agriculture 16:217-228.

Nedunchezhiyan M, Byju G, Jata SK (2012). Sweet Potato Agronomy. Fruit, Vegetable and Cereal Science and Biotechnology 6(1):1-10.

Oswald A, Alkamper J, Midmore D J (1995). The effect of different shade levels on growth and tuber yield of sweet potato: II. tuber yield. Journal of Agronomy and Crop Science 175:29-40.

Prithiviraj B, Carruthers K, Fe Q, Cloutier D, Martin RC, Smith DL (2000). Intercropping of corn with soybean and lupin for silage: effect of seeding date on yield and quality. Journal of Agronomy and Crop Science 185(2):129-136.

Rezaei-Chianeh E, Nassab ADM, Shakiba MR, Ghassemi-Golezani K, Aharizad S, Shekari F (2011). Intercropping of maize (Zea mays L.) and faba bean (Vicia faba L.) at different plant population densities. African Journal of Agricultural Research 6(7):1786-1793.

Skelton LE, Barrett GW (2005). A comparison of conventional and alternative agroecosystems using alfalfa (Medicago sativa) and winter wheat (Triticum aestivum). Renewable Agriculture and Food Systems 20(1):38-47.

Wang N, Jiang D, Hong J, Feng Z, Xiao-Yan W (2003). Diurnal changes of RuBisco and RCA activities and their cellular localization in rice. Journal of Integrative Plant Biology 45(9):1076-1083.

Wang XP, Li BG, Guo Y, Zhai Z (2004). Measurement and analysis of the 3D spatial distribution of photosynthetically active radiation in maize canopy. Acta Agronomica Sinica 30(6):568-576.

Wells AT, Chan KY, Cornish PS (2000). Comparison of conventional and alternative vegetable farming systems on the properties of a yellow earth in New South Wales. Agriculture, Ecosystems and Environment 80:47-60.

Weng XY, Jiang DA, Zhang F (2002). Gene expression of key enzymes for photosynthesis during flag leaf senescence of rice after heading. Journal of Plant Physiology and Molecular Biology 28(4):311-316.

Willey R (1979). Intercropping - Its importance and research needs. Part 1. Competition and yield advantages. Field Crops Abstracts 32:1-10.

Wolfe MS (1985). The current status and prospects of multiline cultivars and variety mixtures for disease resistance. Annual Review of Phytopathology 23(23):251-273.

Wu JS, Lin QM, Huang QY (2006). Measuring method and application of microbial biomass in soil. Beijing: China Meteorological Press.

Wu YS, Gong WZ, Liao DP, et al (2015). Effects of shade and light recovery on soybean cultivars (lines) and its relationship with yield in relay strip intercropping system. Acta Agronomica Sinica 41(11):1740-1747.

Xiao G, Long W, Zhao P, Guo H (2013). Photosynthetic characteristics and yield of corn and sweet potato in monoculture and intercropping. Journal of Yunnan Agricultural University 28(1):52-55.

Xu DQ, Zhang YZ, Zhang RX (1992). Photoinhibition of photosynthesis in plants. Plant Physiology Communications 28(4):237-243.

Yan ZD, Zhu CZ, Sheng JL (1964). Studies on the drought resistant characters of sweet potato varieties. Acta Agronomica Sinica 3(2):183-194.

Yong TW, Yang WY, Wang XC, Fan GQ (2009). Nitrogen uptake and utilization and interspecies reciprocity in the two relay-planting systems. Journal of Sichuan Agricultural University 27(2):167-172.

Yong TW, Yang WY, Xiang DB, Wan Y, Liu W, Wang X (2012). Effect of wheat/maize/soybean and wheat/maize/sweet potato relay strip intercropping on soil nitrogen content and nitrogen transfer. Acta Agronomica Sinica 38(1):148-158.

Zhang QT (2015). Sweet potato in western China. Chongqing: Southwest Normal University Press, pp 242-245.

Zhao XL, Cheng HT, Lv GH (2006). Advances in soil microbial biomass. Journal of Meteorology and Environment 22(4):68-72.

Zhou LJ, Xie YQ, Xu W, Guo QH, Dai S, Zhao SJ, Song JM (2015). Effects of full sunlight after shading on photosynthetic characteristics of Xiaoyan 54 and 8602, and their hybrids. Acta Agronomica Sinica 41(5):813-81.

Zhu JQ, Chu TF, Xu MS (1993). Study on intercropping adaptability of sweet potato under the maize community. Journal of Zhejiang Agriculture 5:202-205.

How to Cite
LYU, C., TANG, D., ZHANG, K., & WANG, J. (2020). Influence of ridges for planting sweet potato on symbiotic ecological factors, photosynthetic abilities and population yield in relay intercropping system. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 48(2), 849-861.
Research Articles