不同覆盖方式下旱植水稻N、P、K吸收特性研究  

N,P,K Absorption Characteristics of Upland Rice under Different Mulching Modes

作　　者：卓儒洞[1] 张玉烛 刘洋 

机构地区：[1]吉首大学城乡规划学院,湖南张家界427000 [2]湖南省水稻研究所,长沙410125

出　　处：《作物研究》2012年第6期623-626,共4页Crop Research

基　　金："十一五"国家粮食丰产科技工程项目(2006BAD02A01)

摘　　要：以品种P88S/1128为材料,设置地膜覆盖、稻草覆盖和液体膜覆盖3个处理,以裸地为对照,研究了不同覆盖方式对旱作水稻N、P、K吸收特性的影响。结果表明,覆盖方式对旱作水稻N、P、K吸收特性有明显影响,稻草覆盖栽培有效提高了分蘖期植株对N素营养的吸收,为大群体的建立打下基础;成熟期茎秆和叶片中P素含量都降至最低,稻穗P素含量显著提高,其中以稻草覆盖处理最高,达3.70 g/kg,液膜覆盖处理次之,不覆膜最低;成熟期稻穗K素含量在成熟期降至最低,仅为2.40～3.08 g/kg,4种处理间差异不明显。从不同栽培模式比较来看,地膜、稻草、液膜覆盖处理对N、P、K营养元素的吸收量都显著高于不覆膜对照,表明覆盖栽培增强了旱植水稻对营养元素的吸收能力,其中以地膜覆盖处理最为明显。The effect of coverage mode on N, P, K absorption characteristics of upland rice were studied by using P88S/ 1128 as material under three coverage cultivation treatments and bare cultivation （control）. The result showed that mulching have a significant effect on N, P, K absorption characteristics of upland rice. Straw mulching promoted absorption of N on the tillering stage, and the content of P on spike was the highest, arrived at 3.70 g/kg. The content of K on spike reduced to minimum at mature period, only 2.40 - 3.08 g/kg, there were no significant difference between the treatments. At the same time, comparing with bare cultivation, mulching cultivation enhanced the absorption ability for nutrient elements, the effect of plastic film mulching was most obvious,

关 键 词：旱作水稻 栽培 覆盖 营养元素 吸收 

分 类 号：S511.601[农业科学—作物学]