The nitrogen (N) contribution of rye (Secale cereale L.) to tomato production may increase when grown and applied with hairy vetch (Vicia villosa R.) to the soil. To examine the uptake and recovery efficiency by tomatoes and retention in the soil of N derived from ¹⁵N-labeled rye applied as a monoculture and biculture with hairy vetch, a Wagner pot examination was conducted under plastic high tunnel conditions in Sapporo, Japan. Irrespective of cover crop residue management, the peak of rye-derived N uptake occurred between 4 and 8 weeks after transplanting (WAT) and ceased between 8 and 12 WAT. Rye-derived N uptake by tomatoes (shoot + fruit) was 58.3% greater in rye monoculture treatment than in the biculture of hairy vetch and rye treatment because of higher rye-derived N input, whereas rye-derived N recovery was greater in the biculture treatment (34.0%) than in monoculture treatment (26.9%). The soil retained 47.0% and 52.5% of the rye-derived N input in the biculture (972 mg N/pot) and rye monoculture (1943 mg N/pot) treatments, respectively. Rye-derived N stored in the roots and possibly lost was estimated at 19.0% and 20.6% of the rye-derived N input in the biculture and monoculture treatments, respectively. Hairy vetch in the biculture treatment contributed 46.2% more N to tomato production than rye, and the hairy vetch N contribution was more significant during the late period (4–8 WAT) than the early period (0–4 WAT) of tomato cultivation. Therefore, the biculture may change the N release pattern from both hairy vetch and rye, with the cover crops releasing high amounts of N in both the early and late periods of tomato cultivation. These results may help improve N management in vegetable production systems by maximizing the use of plant-derived N by crops, thereby reducing N fertilizer inputs.

黑麦（Secale graine L.）对番茄产量的氮（N）贡献可能会增加，并与多头紫etch（Vicia villosa R.）一起施用到土壤中。检查番茄的吸收和恢复效率以及从^15中提取的氮在土壤中的保留N标记的黑麦以单羽和双羽的紫菜形式应用，在日本札幌的塑料高隧道条件下进行了Wagner罐检验。不管是否进行覆盖作物残茬管理，黑麦来源的氮吸收峰值都发生在移栽（WAT）后4至8周之间，并在8至12 WAT之间停止。黑麦单作处理中番茄（黑麦+水果）对黑麦的氮吸收比毛etch子和黑麦处理的双文化处理高58.3％，因为黑麦衍生的氮输入较高，而黑麦衍生的氮回收在双培养中更大。处理（34.0％）比单培养处理（26.9％）高。在双培养（972毫克氮/盆）和黑麦单培养（1943毫克氮/盆）处理中，土壤分别保留了47.0％和52.5％的黑麦来源的氮输入。黑麦来源的氮储存在根中，可能会损失，在双培养和单培养处理中分别占黑麦来源氮输入量的19.0％和20.6％。在双培养处理中，紫菜对番茄生产的氮贡献比黑麦高46.2％，在番茄栽培的后期（4-8 WAT）比早期（0-4 WAT）的etch菜N贡献更大。因此，双重栽培可能会改变紫etch和黑麦的氮素释放模式，而表皮作物在番茄栽培的早期和晚期都释放出大量的氮素。这些结果可通过最大程度地利用农作物的植物来源氮，从而减少氮肥投入，来帮助改善蔬菜生产系统中的氮管理。在双培养和单培养处理中，分别有6％的黑麦衍生氮输入。在双培养处理中，紫菜对番茄生产的氮贡献比黑麦高46.2％，在番茄栽培的后期（4-8 WAT）比早期（0-4 WAT）的etch菜N贡献更大。因此，双重栽培可能会改变紫etch和黑麦的氮素释放模式，而表皮作物在番茄栽培的早期和晚期都释放出大量的氮素。这些结果可通过最大程度地利用农作物的植物来源氮，从而减少氮肥投入，来帮助改善蔬菜生产系统中的氮管理。在双培养和单培养处理中，分别有6％的黑麦衍生氮输入。在双培养处理中，紫菜对番茄生产的氮贡献比黑麦高46.2％，在番茄栽培的后期（4–8 WAT）比早期（0–4 WAT）对紫菜的氮贡献更大。因此，双重栽培可能会改变紫v和黑麦的氮素释放模式，而表皮作物在番茄栽培的早期和晚期都释放出大量的氮素。这些结果可通过最大程度地利用农作物的植物来源氮，从而减少氮肥投入，来帮助改善蔬菜生产系统中的氮管理。番茄栽培后期（4–8 WAT）的毛v菜N贡献要比早期（0–4 WAT）大。因此，双重栽培可能会改变紫etch和黑麦的氮素释放模式，而表皮作物在番茄栽培的早期和晚期都释放出大量的氮素。这些结果可通过最大程度地利用农作物的植物来源氮，从而减少氮肥投入，来帮助改善蔬菜生产系统中的氮管理。番茄栽培后期（4–8 WAT）的毛v菜N贡献要比早期（0–4 WAT）大。因此，双重栽培可能会改变紫etch和黑麦的氮素释放模式，而表皮作物在番茄栽培的早期和晚期都释放出大量的氮素。这些结果可通过最大程度地利用农作物的植物来源氮，从而减少氮肥投入，来帮助改善蔬菜生产系统中的氮管理。