Brennan Eric B, Acosta-Martinez Veronica
United States Department of Agriculture, Agricultural Research Service, USA.
Data Brief. 2018 Sep 12;21:212-227. doi: 10.1016/j.dib.2018.09.013. eCollection 2018 Dec.
Cover crops and compost are organic matter inputs that can impact soil health in tillage-intensive, high-input, organic vegetable production systems in the central coast region of California. Data are presented on soil microbial biomass (carbon and nitrogen) and soil enzymes (β-glucosidase, β-glucosaminidase, alkaline phosphatase, aspartase and L-asparaginase and dehydrogenase) from a relatively long-term organic systems experiment in Salinas, California that was focused on lettuce and broccoli production and included eight different certified organic systems. These systems differed in compost inputs, cover cropping frequency, cover crop type, and cover cropping seeding rate. The compost was made from urban yard waste, and the cover crops included rye, a legume-rye mixture, and a mustard mixture planted at two seeding rates (standard rate 1× versus high rate 3×). There were three legume-rye 3× systems that differed in compost inputs (0 versus 15 Mg ha year and cover cropping frequency (every winter versus every fourth winter). The data in this article support and augment information presented in the research articles "Cover cropping frequency is the main driver of soil microbial changes during six years of organic vegetable production" (Brennan and Acosta-Martinez, 2017) and "Cover crops and compost influence soil enzymes during 6 years of tillage-intensive, organic vegetable production" (Brennan and Acosta-Martinez, 2018).
覆盖作物和堆肥是有机物质输入，会影响加利福尼亚州中部海岸地区集约化耕作、高投入的有机蔬菜生产系统中的土壤健康状况。本文展示了来自加利福尼亚州萨利纳斯一项相对长期的有机系统试验的数据，该试验聚焦于生菜和西兰花生产，涵盖八个不同的认证有机系统，数据涉及土壤微生物生物量（碳和氮）以及土壤酶（β-葡萄糖苷酶、β-氨基葡萄糖苷酶、碱性磷酸酶、天冬氨酸酶、L-天冬酰胺酶和脱氢酶）。这些系统在堆肥投入、覆盖作物种植频率、覆盖作物类型以及覆盖作物播种率方面存在差异。堆肥由城市庭院废弃物制成，覆盖作物包括黑麦、豆科植物与黑麦的混合物，以及两种播种率（标准播种率1倍与高播种率3倍）下种植的芥菜混合物。有三个豆科植物与黑麦3倍播种率的系统，它们在堆肥投入（0与15 Mg ha/年）以及覆盖作物种植频率（每年冬季与每四年冬季一次）方面存在差异。本文中的数据支持并扩充了研究论文《覆盖作物种植频率是有机蔬菜生产六年期间土壤微生物变化的主要驱动因素》（布伦南和阿科斯塔 - 马丁内斯，2017年）以及《覆盖作物和堆肥在六年集约化耕作有机蔬菜生产期间对土壤酶的影响》（布伦南和阿科斯塔 - 马丁内斯，2018年）中呈现的信息。
