AI Article Synopsis
- Agroforestry is shown to be an effective method for restoring disturbed land and improving local economies on the Loess Plateau, specifically through intercropping trees with crops.
- The study focused on walnut or plum trees intercropped with soybean and pepper, highlighting a significant decline in crop yield and growth as the distance from tree rows decreased due to light competition.
- Soil moisture content positively impacted the biomass and yield of soybean and pepper, while the overall light availability (photosynthetic active radiation) was a crucial factor affecting crop performance.
Article Abstract
Agroforestry is the most effective way for the restoration of disturbed land on Loess Plateau and the development of poorly local economy. Taking the tree-based intercropping systems of walnut or plum with soybean or pepper in the loess area of Weibei as test objects, the photosynthesis, growth, and yield of soybean (Qindou 8) and pepper (Shanjiao 981) in the systems were studied. The results showed that the photosynthetic active radiation (PAR), net photosynthetic rate (Pn), growth, and yield of individual soybean or pepper plants were significantly decreased, with the effects increased with decreasing distance from tree rows. Leaf water potential was not significantly or poorly correlated with the Pn, growth, and yield of the two crops. However, there were significant positive correlations between the soil moisture content in 10-20 cm layer and the biomass and yield of soybean, and the above-ground biomass of pepper. PAR was highly correlated with the yield of both crops, which indicated that light competition was one of the key factors leading to the decrease of crop yield.
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