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Effects of Different Organic Soil Amendments on Nitrogen Nutrition and Yield of Organic Greenhouse Tomato Crop

机译：不同有机土壤修正对有机温室番茄作物氮营养和产量的影响

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摘要

Manure is a common source of nitrogen (N) in organic farming. However, manure is not always easily available, while the maximum N amount added as animal manure in organic agriculture is restricted by EU regulations. The present study was designed to test whether green manuring with a warm-season legume and intercropping with a cold-season legume can substitute farm-yard manure or compost as N sources in organic greenhouse tomato crops. To test this hypothesis, a winter-spring (WS) tomato crop was installed in February following the incorporation of crop residues of an autumn-winter (AW) tomato crop intercropped with faba bean, which had been fertilized with cowpea residues as green manure. This treatment, henceforth termed legume treatment (LT), was compared with the use of compost or manure as an N fertilization source in both tomato crops. In addition, a combination of compost and LT was also used as a fourth treatment. The results showed that green manuring with legumes and particularly cowpea can contribute a significant amount of N to the following organic tomato crop, through the biological fixation process. Nevertheless, legumes as green manure, or compost, or their combination cannot efficiently replace farmyard manure as an N fertilization source. Compost exhibited a slow mineralization course.
机译：粪肥是有机耕作中的氮气源（n）。然而，粪肥并不总是可用的，而当有机农业中的动物粪肥被添加的最高N金额受欧盟法规的限制。本研究旨在测试绿色皱纹是否与暖季豆类和寒冷季节的间作，可以将农场粪便或堆肥替代有机温室番茄作物中的N个来源。为了测试这一假设，2月份安装了冬季春天（WS）番茄作物，该作物在与Faba Bean的秋冬（AW）番茄作物间作的作物残留物中，已被施肥为绿色粪便。这种治疗从此称为豆科治疗（LT），与在两种番茄作物中使用堆肥或粪肥作为N施肥来进行比较。另外，堆肥和LT的组合也用作第四种处理。结果表明，通过生物固定过程，用豆类和特别是豇豆用豆类和特别是豇豆的绿色粪便可以促进以下有机番茄作物。然而，豆类作为绿色粪便，或堆肥，或其组合不能有效地将饲养饲养粪便替换为N施肥来源。堆肥展出了缓慢的矿化课程。

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