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首页> 外文期刊>Sustainable Agriculture Research >Evidence of Soil Health Benefits of Flooded Rice Compared to Fallow Practice
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Evidence of Soil Health Benefits of Flooded Rice Compared to Fallow Practice

机译：与休闲实践相比，水淹稻田对土壤健康有益的证据

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p class="sar-body"Flooded rice (Oryza sativa L.) in south Florida is grown commercially in rotation with sugarcane and vegetables. From 2008 to 2018, rice production has doubled. During the spring-summer, nearly 200 kmsup2/sup of fallow sugarcane land is available for rice production. In 2017, approximately 113 kmsup2/sup of rice were planted in the region. The net value of growing rice as a rotation crop far exceeds its monetary return. This study evaluated soil health parameters before and after rice cultivation and compared them against two other common summer farming practices - fallow fields and flooded-fallow. The soil health parameters that were tested as part of this study included soil pH, bulk density, water holding capacity, cation exchange capacity, organic matter, active carbon and nutrient content. Results indicated an increase in soil pH, and a significant reduction in soil bulk density due to rice cultivation. Water holding capacity increased significantly under all flooded land use practices compared to fallow fields. Cation exchange capacity significantly increased when sugarcane fields were cultivated with rice and ratoon rice, nearly doubled from 58 to 101 cmolc kgsup-1/sup. Small, yet significant 3% increase in organic matter was observed when sugarcane fields were cultivated with ratoon rice. Almost 16 g kgsup-1/sup of active C is being generated within fallow soils, whereas less than half that under flooded practices, limiting the amount of soil loss via oxidation. Based on the soil health index, rice cultivation and flooded-fallow improved overall soil quality compared to fallow lands.
机译：class =“ sar-body”>佛罗里达州南部的大米（Oryza sativa L.）是与甘蔗和蔬菜一起商业种植的。从2008年到2018年，大米产量翻了一番。在春夏季，将近200 km 2 休耕的甘蔗土地可用于水稻生产。 2017年，该地区种植了大约113 km 2 水稻。作为轮作作物种植的水稻的净值远远超过其货币收益。这项研究评估了水稻种植前后的土壤健康参数，并将其与其他两种夏季种植方式（休耕地和休耕地）进行了比较。作为这项研究的一部分测试的土壤健康参数包括土壤pH值，堆积密度，持水量，阳离子交换量，有机质，活性炭和养分含量。结果表明，由于水稻种植，土壤pH值增加，土壤容重显着降低。与休耕地相比，在所有水淹土地使用方式下，持水量均显着增加。稻田和再生稻一起种植甘蔗田时，阳离子交换能力显着提高，从58 cmolc kg -1 几乎翻了一番。当用再生稻种植甘蔗田时，观察到有机质的增加很小，但明显增加了3％。休耕土壤中将生成近16 g kg -1 的活性碳，而在淹水条件下则不到一半，限制了土壤因氧化而流失的数量。根据土壤健康指数，与休耕地相比，水稻种植和水淹改善了土壤的整体质量。

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