不同放鸭与种植密度对有机栽培水稻干物质积累、转运及产量的影响

Effects of Different Duck Density and Planting Density on Dry Matter Accumulation,Translocation and Yield of Organic Cultivation Rice

为探明不同放鸭与种植密度对有机栽培水稻干物质生产特性的影响,于2020年在贵州省三穗县以宜香优2115为材料,开展了放鸭密度为主区、种植密度为副区的两因素裂区设计试验。结果表明,随着放鸭密度的增加,水稻孕穗期和抽穗期的叶面积指数均呈现先升高后下降的趋势,且以450只/hm^(2)处理最高。同时放鸭处理提高了水稻生育前期、后期干物质积累,但减少了中期干物质积累。相对于不放鸭处理,放鸭处理明显提升每穗粒数。水稻产量随放鸭密度的增加呈现先上升后下降的趋势。高种植密度可提高最高茎蘖数,提升叶面积指数,提高各生育时期干物质积累和转运,并可显著提高产量。放鸭密度为634只/hm^(2)、栽培密度为19.1万丛/hm^(2)时可获得最高产量7131.12 kg/hm^(2)。

In order to ascertain the effects of different duck density and planting density on dry matter production characteristics of organic cultivation rice,a two-factor split plot design experiment was carried out with Yixiangyou 2115 as the material in Sansui County in 2020,in which duck density was the main plot factor and planting density was the sub plot factor.The results showed that the leaf area index of rice at booting and heading stage increased first and then decreased with the increase of duck density,and the highest value was found at 450 ducks/hm^(2).At the same time,stoching duck increased dry matter accumulation in early and late growth period of rice,but reduced dry matter accumulation in middle growth period.Compared with the treatment without duck,the spikelet number per panicle was significantly improved in the treatment with duck.The yield of rice increased first and then decreased with the increase of duck density.High planting density increased the highest tiller number,leaf area index,dry matter accumulation and translocation at different growth stages,and significantly increased yield.The highest yield was 7131.12 kg/hm^(2)when the stocking density was 634 ducks/hm^(2)and the planting density was 191000 clumps/hm^(2).