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The effect of low and high fertility treatments on soil quality, yields, pest incidence and labor requirements of a post-transitional organic market garden system.

機(jī)譯：低和高肥力處理對(duì)過(guò)渡后有機(jī)市場(chǎng)花園系統(tǒng)土壤質(zhì)量，產(chǎn)量，病蟲(chóng)害發(fā)生和勞動(dòng)力需求的影響。

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摘要

In a two-year study, eight vegetable crops were grown as part of a certified organic four-year crop rotation. High input plots received off-farm composted cow manure and cover crops, and low input plots were managed with the use of cover crops only. High input plots produced higher yields than low input plots in all crops, except peas, which yielded higher in low input plots. Soil organic matter levels were significantly higher in the high input than the low input plots and increased from 2003 to 2004 in both treatments. Available soil phosphorus levels in the high input plots were excessive, while potassium levels were excessive in both treatments. The addition of manure-based composts can increase yields in a post-transitional organic market garden system. However, farmers should balance the costs of either production or purchase of compost against the benefits in yield, increased soil fertility, and possible negative effects associated with excess nutrients.
機(jī)譯：在一項(xiàng)為期兩年的研究中，作為經(jīng)過(guò)認(rèn)證的四年有機(jī)輪作的一部分，種植了八種蔬菜。高投入的地塊接受了農(nóng)場(chǎng)外的堆肥牛糞和覆蓋作物，而低投入的地塊僅通過(guò)使用覆蓋作物進(jìn)行管理。除豌豆外，所有作物的高投入地塊均比低投入地塊產(chǎn)生更高的產(chǎn)量，豌豆在低投入地塊中產(chǎn)量更高。在高投入條件下，土壤有機(jī)質(zhì)水平顯著高于低投入條件下的土壤水平，并且從2003年到2004年，兩種處理均增加。在兩種處理中，高投入?yún)^(qū)的有效磷水平都過(guò)高，而鉀水平過(guò)高。添加基于肥料的堆肥可以提高過(guò)渡后有機(jī)市場(chǎng)花園系統(tǒng)的產(chǎn)量。但是，農(nóng)民應(yīng)在生產(chǎn)或購(gòu)買堆肥的成本與收益，增加土壤肥力以及與過(guò)多養(yǎng)分相關(guān)的負(fù)面影響之間取得平衡。

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