不同种植模式对黄土高原半干旱区物种多样性与生产力及其关系的影响

he relationship between species diversity and productivity is a hot issue in ecology research, but there are still many controversies. We carried out an experiment with combinations of three crops (Zea mays, Pisum sativum and Solanum tuberosum) under different row ratios. A field experiment were conducted to study the relationship between species diversity and productivity, and to screen out the suitable intercropping pattern in Loess Plateau semi-arid areas of China. The agronomic characters and benefits of different intercropping patterns were studied. The main results were as follows: compared with monoculture of maize, expect for plant height, the agronomic characters of maize had no significant difference in maize/pea and maize/potato intercropping patterns, while in the pea/potato intercropping pattern, some agronomic characters of potato were significantly improved. The number of pods per plant and number of branches changed in maize/pea and pea/potato intercropping patterns. Moreover, the results showed that there was no necessary relationship between species diversity and productivity, and plant community productivity does not necessarily relate to plant species diversity, but relates to intercropping combinations and row ratio.