In order to study the demand of tomato (Lycopersicon esculentum) for water and fertilizer in off-season in the dry-hot valley of Jinsha river, Yunnan, China, organic fertilizer was applied at different rates under two irrigation systems to analyze the effect of fertilizer application rates on the yield and aboveground biomass of tomato. The results showed that organic fertilizer applied at a rate of 15 t/ha under the irrigation system of W1 (actual soil content of 79% as minimum and 90% as maximum) improved obviously tomato yield per plant and per unit area, while the highest organic fertilizer supply (W1M3) had the lowest tomato yield. The yield of tomato and above-ground biomass increased with the organic fertilizer at a increasing rate under the irrigation system of W2 (irrigated once every 5 days, 2 h for each round of irrigation). The tomato of treatment W2M3 yielded 45.71%higher than the control.%为研究金沙江干热河谷地区反季番茄对水肥的需求状况,本研究开展2个灌水模式下不同有机肥施用量对番茄产量和地上生物量的影响.结果表明:在W1(实际土壤含水量的70%为下限,90%为上限)灌水模式下,有机肥的施用量为15 t/hm2时,可显著提高番茄的单株产量和单位面积产量,而有机肥施用量最高的小区(W1M3)番茄产量最低:在W2(5 d灌水1次,每次2 h)灌水模式下,番茄产量和地上生物量随施肥量的增加而增加,W2M3处理的番茄产量比对照增产45.71%.
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