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首页> 外文期刊>Revista Caatinga >BIOCHAR AS SOIL CONDITIONER IN THE SUCCESSION OF UPLAND RICE AND COWPEA FERTILIZED WITH NITROGEN
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BIOCHAR AS SOIL CONDITIONER IN THE SUCCESSION OF UPLAND RICE AND COWPEA FERTILIZED WITH NITROGEN

机译：氮肥施用对旱稻和玉米冠心病演替中生物炭作为土壤调节剂

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The effects of biochar and nitrogen application on yields of upland rice and cowpea and on soil fertility were determined in a greenhouse in Macaíba, RN, Brazil. The trial consisted of the succession of two crops in a completely randomized design and a factorial scheme, with four replicates. Initially, four doses of biochar and four doses of nitrogen were tested for cultivation of rice. Subsequently, four doses of biochar and two doses of nitrogen were tested in half of the pots maintained for planting cowpea. Soil was sampled after rice harvest for half of the pots and at end of the trial for the remaining pots. We evaluated the following parameters: mass of hundred grains of rice, dry shoot mass, panicle number, number of filled spikelets and of empty spikelets, and grain production. Determinations for cowpea were: pod number per pot, grain number per pod, and grain production per pot. Measured soil parameters were: pH, contents of organic carbon, P, K, Ca, Mg, Na, cation exchange capacity, and exchangeable sodium percentage. Biochar addition did not influence yield components of upland rice and cowpea, but resulted in increased soil N retention, which influenced rice dry shoot mass, spikelets sterility, panicle number, and grain mass. Biochar also promoted increased soil pH, potassium content, and exchangeable sodium percentage and decreased calcium and magnesium concentrations.
机译：在巴西RN的Macaíba的一个温室中确定了生物炭和氮肥的施用对旱稻和cow豆产量以及土壤肥力的影响。该试验包括以完全随机的设计和因子分解方案对两种农作物进行演替，并进行四次重复。最初，测试了四剂生物炭和四剂氮素用于水稻的栽培。随后，在一半用于种植cow豆的盆中测试了四剂生物炭和两剂氮。水稻收成后对一半的花盆取样，在试验结束时对其余的花盆取样。我们评估了以下参数：稻米的百粒质量，干梢质量，穗数，小穗实粒和空小穗数以及谷物产量。对cow豆的测定为：每盆荚数，每荚粒数和每盆谷物产量。测得的土壤参数为：pH，有机碳含量，P，K，Ca，Mg，Na，阳离子交换容量和可交换钠百分比。添加生物碳不会影响旱稻和cow豆的产量构成，但会增加土壤氮素的保留，从而影响水稻的干梢质量，小穗不育性，穗数和籽粒质量。生物炭还促进了土壤pH值，钾含量和可交换钠含量的增加，并降低了钙和镁的浓度。

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