种植方式对陆稻和水稻生长特性和产量形成的影响

With upland rice of Zhonghan 3 (japonica) and paddy rice of Wuxiangjing 99-8 (japonica) as materials, the effects of different cultivation methods on the growth characteristics and yield formation were studied. The results showed that plastic film mulching cultivation (PFMC) rice had faster tillering, smaller percentage of productive tillers, and decreased more slowly from heading to maturity in chlorophyll content and root bleeding intensity at grain filling stage, higher transportation and export rate of assimilate in stem and sheath than those of moist cultivation rice (MC, control),and reverse was under bare cultivation (BC). Root-shoot ratio，Active grain filling period and harvest index of dry-cultivated rice were smaller or lower than those of MC, but grain filling rate was reverse. The grain yield and ratio of spikelets to total LAI were significantly lower under PFMC　than under MC　for upland rice and showed no significant difference between PFMC and MC for paddy rice, and their yield were the lowest under BC among the three cultivation methods for two cultivars. Compared with paddy rice. upland rice exhibited higher percentage of productive tillers and faster grain filing rate. Upland rice had faster declining speed in chlorophyll content and root bleeding intensity at grain filling stage, shorter active grain filling period, and transportation and export rate of assimilate in stem and sheath, ratio of spikelets to total LAI ，harvest index and yield of upland rice were smaller or lower than those of paddy rice. The approaches to increasing the grain yield in dry-cultivated of paddy and upland rice were discussed.