Effects Of Transplanting Location And Density On The Morphological And Population Quality Of Different Types Of Rice

With four rice varieties (Hybrid indica Jinyou 527, Conventional indica Cangmi O11, Hybrid Japonica 9you 418, Conventional Japonica Hexi39) as materials, in the low altitude region Ya'an (600m), high altitude region Xichang (1590m). Studies were conducted on the effect of different transplanting density to morphological characteristics and the population quality of different rice varieties in different ecological zones. The results were as follows:(1) Not only in the form of rice leaves are different in varieties, but also because of cultural sites and planting density varies. Leaf length, leaf width, leaf length to width ratio, were greater in Yaan than in Xichang; The leaf length and leaf width of the upper three leaves in the two places,with the increase of planting density smaller and smaller; Two indica rice cultivars upper leaf (Leaf fall 1,2) aspect ratio were less than two japonica rice; Yaan's specific leaf weight of the sparse level, bigger before heading and then decreased rapidly after heading. In Xichang, sparse's specific leaf weight was greater than dense's in the whole growth period;Two locations of flag leaf base angle, reduced with the increase of planting density, The upper three leaves Opening angle of Yaan also decreased with increasing density, while difference was not significant in different densities in Xichang;. The upper part of the two indica rice varieties clover leaf base angle and opening angle are greater in Yaan than in Xichang, while the opposite trend of the two japonica rice varieties. All varieties of pillows from the upper leaf clover was significantly greater in Yaan than in Xichang. Flag leaf and two leaves were loose degree decreases with increasing density in the two locations, the upper three leaves are loose degree in Yaan than in Xichang, especially in indica varieties. The height was significantly higher in Yaan than in Xichang, and in particular the two indica rice varieties, both plant height increased with planting density increases. The results suggest that indica varieties cultivated in different plant type, significant difference between locations, japonica rice plant type of environmental effect is relatively smallAs a result of treatments in different plant type, the field of light transmission rates are different. Overall, the handle 40cm-100cm light rejection in Xichang was significantly higher than in Yaan,the highest-density had the minimum transmittance; B2 had highest light transmittance.(2) Rice Basal length, diameter, stem weight ratio and lodging properties in different species, planting location and plant density there was a difference between. In Yaan the base of the two keeps the length of the base diameter of three sections than Xichang point, but stem weight ratio was significantly lower than the Xichang; Two sites of the three basal stem diameter, stem weight and stem-type than the index with the density increases.Two indica rice cultivars than stem weight and stem-based index of greater than two Japonica varieties, greater than the conventional hybrid species.Xichang base steadily between the break point moments (M) were significantly larger than Yaan, especially the two Japonica rice varieties, Two places'M-values increased with planting density decreases, the two japonica varieties of M is greater than the two indica rice varieties; Xichang base point among the three steadily bending moment (WP) values were significantly smaller than Yaan point, Yaan the base of the three inter-WP steadily increased with planting density were then decreased, while the Xichang base steadily between the three WP increased with the increase of planting density decreased, the two hybrids of WP than two conventional varieties; In Yaan,the base of the three of lodging index were significantly greater than the Xichang point, Yaan point between the base of three sections with LI are the increase of planting density, the base of a base in Xichang of LI was not significant, Xichang base 2,3 LI between sections with increasing planting density, were then decreased, In Yaan, two japonica rice varieties (especially B3) LI were lower, while two hybrid rice point lower LI in Xichang.(3) Planting location and plant density on the varieties of tillers, source-sink relations and material accumulation and the operation also have some impact. The highest tillers, spikelets in Xichang points higher than in Yaan point; The highest seedling and spikelets in two locations were increased with planting density increasing. LAI before heading is greater in Xichang than in Yaan, but after heading down faster in Xichang; LAI in two places are increased with the density increased. Grain-leaf ratio of the two sites, the difference was not significant in the heading,Xichang's grain-leaf ratio significantly higher than Yaan's in the mature stage; Yaan's grain-leaf ratio between the difference in the three density was not significant,Xichang's leaf ratio increased as the density increases; Overall, the two indica rice varieties of grain-leaf ratio is greater than the two rice varieties, especially Yaan.Xichang dry matter accumulation was significantly greater than Yaan, Dry matter accumulation is increased with the increase of planting density,planting density on dry matter accumulation of more in Yaan than in Xichang; Dry matter accumulation in the difference between locations, hybrids are greater than conventional varieties,Indica rice varieties are greater than japonica rice,conventional varieties and japonica rice varieties more stable. On leaf dry matter distribution ratio, in Yaan higher than in Xichang,Indica varieties are lower than japonica rice, Leaf, stem and sheath material output and conversion rates, higher in Yaan than in Xichang, with the increase of planting density first increases and then decreases, the two conventional varieties are more than two hybrids.(4) Rice production has a greater difference between different cultural locations, planting density and variety of types. Yaan point panicles and grain weight Xichang points less than the number of grains larger than Xichang point; Hybrid grain number and grain weight higher than conventional types, Xichang hybrid seed points lower than the conventional kind of degree; As the density increases, effective ear increased,while the number of grains decreased. Production of all varieties were higher in Xichang than in Yaan, especially the two conventional species; Production of all varieties were affected by density; In general, the density and high density have a higher yield in two locations.