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以河南省周口地区黄淮海平原三个主要土壤(两合土、青砂土、淤土)上农桐(兰考泡桐Paulownia elongata S.Y.Hu)间作的调查研究资料,分析了十年生,株行距4×30米,麦棉套种的农桐间作生态系统的生物量和生产力。研究表明,这个系统的现存量:两合土达33.744229T/ha,青砂土达26.687175T/ha,淤土达27.714088T/ha。年均生产量:两合土18.810356T/ha/a、青砂土15.679766T/ha/a、淤土18.981786T/ha/a。光能利用率:两合土1.32%,青砂土1.1%,淤土1.37%。生产力达到较高水平。根据调查资料(包括树干解析),共建立回归方程77个,其中59个达到极端显著水平,14个达到显著水平,4个不显著。
Based on the investigation and research data of Paulownia elongata SYHu on three major soils of Huang-Huai-Hai Plain in Zhoukou area of Henan Province (two-loam soil, sandy soil and silt soil) The biomass and productivity of 30 m wheat and cotton intercropping agroecosystem. The study shows that the existing stock of this system is 33.744229 T / ha in two loam, 26.687175 T / ha in sandy loam and 27.714088 T / ha in silt. The average annual production: two combined soil 18.810356T / ha / a, sandy soil 15.679766T / ha / a, silt 18.981786T / ha / a. Light energy utilization rate: 1.32% of two combined soil, sandy sand 1.1%, silt 1.37%. Productivity has reached a high level. According to the survey data (including trunk analysis), a total of 77 regression equations were established, of which 59 reached the extremely significant level, 14 reached a significant level, 4 were not significant.