Agricultural intensification has caused a strong agro-biodiversity decline in Europe, with high losses in rare arable plants. A better understanding of the relationship between these species, agricultural productivity, and other ecosystem functions can improve conservation management. The study was performed on an experimental field near Munich. To examine the results under field conditions, study plots were additionally established on ten arable fields distributed in the Munich Plain, an area with nutrient poor soils in southern Germany. We sowed a mixture of ten rare arable plant species at varying crop densities and compared them to plots without rare arable plants. To assess the effects on plant diversity and productivity, the cover and species richness of rare and common arable plants and the crop and arable plant biomass were assessed. The organic matter, nitrogen concentration, as well as the biomass and abundance of earthworm (biannually sampled for two years) were analyzed to determine the impact on soil fertility.

Our results showed that sowing rare arable plants did not negatively affect crop biomass. Arable plant biomass and cover of rare arable plants were highest when no crops were sown. There was no difference between reduced and regular crop sowing densities on rare arable plant cover. In our field experiment, earthworm occurrence and soil organic matter were probably influenced by pre-crops (two years of clover grass before the experiment) and summer droughts during the study period. However, no significant effects of sowing rare arable plants on soil fertility were detected. These results were partly verified from results of the field study.

At least on nutrient-poor soils, rare arable plant sowing may be a suitable tool to promote plant diversity conservation without negatively affecting crop production. That the sowing of rare arable plants did not significantly affect the indicators for soil fertility suggests that biomass production of rare arable plants was too low to have an impact on the crops and a benefit for soil fertility. Insignificant effects on crop biomass also suggest that sowing rare arable plants does not automatically lead to crop losses. As organic matter, nitrogen concentration and earthworm occurrence slowly respond to environmental changes, they should be investigated in further long-term experiments. This study shows that conservation of rare arable plants and food production on nutrient poor fields can be combined. Therefore, land sharing may be a suitable tool for nature conservation and ecosystem functionality on arable land.

农业集约化在欧洲造成了严重的农业生物多样性下降，稀有可耕植物损失惨重。更好地了解这些物种，农业生产力和其他生态系统功能之间的关系可以改善保护管理。该研究是在慕尼黑附近的一个实验场上进行的。为了检验田间条件下的结果，还在慕尼黑平原上分布的10个耕地上建立了研究区，德国南部土壤贫瘠的地区 我们以不同的作物密度播种了十种稀有可耕种植物的混合物，并将它们与没有稀有可耕种植物的地块进行了比较。为了评估对植物多样性和生产力的影响，评估了稀有和常见可耕植物以及作物和可耕植物生物量的覆盖率和物种丰富度。分析（的有机质，氮浓度以及生物量和丰度（每两年采样一次），以确定对土壤肥力的影响。

我们的结果表明，播种稀有可耕植物不会对作物生物量产生负面影响。当不播种作物时，可耕植物的生物量和稀有可耕植物的覆盖率最高。罕见的可耕植物覆盖面积上的播种密度降低与常规播种密度没有差异。在我们的田间试验中，earth的发生和土壤有机质可能受到研究前作物（试验前三叶草两年）和研究期间夏季干旱的影响。然而，没有发现播种稀有可耕植物对土壤肥力的重大影响。这些结果从现场研究的结果中得到部分验证。

至少在营养贫瘠的土壤上，罕见的可耕种植物播种可能是促进植物多样性保护而不会对作物生产造成负面影响的合适工具。稀有可耕植物的播种没有显着影响土壤肥力的指标，这表明稀有可耕植物的生物量生产过低，无法对作物产生影响，对土壤肥力没有好处。对作物生物量的微不足道的影响还表明，播种稀有可耕植物不会自动导致作物损失。由于有机物，氮浓度和worm的发生对环境变化的响应缓慢，因此应在进一步的长期实验中进行研究。这项研究表明，可以将稀有耕地植物的保护与营养不良的田地的粮食生产结合起来。因此，