Analysis Of Lodging Resistance Of Wheat Varieties Mainly Popularized In Shandong Province

Use three multi spike wheat varieties: Jimai22、Liangxing66、Shannong17,three large spike wheat varieties:Liaomai18、Tainong18、Linmai4 in Shandong Province promote as test materials, by analyzing the performance of its lodging,G,H,S and lodging index mutual relations with other stem traits at different densities, evaluate the strength of its lodging capacity, provide a theoretical basis for the high-yield and effective technology for Shandong Province promote wheat varieties,provide a reference for wheat breeding.The main results of study were followed:1. Lodging capacity strength of six varieties. Large spike varieties lodging capacity better than the multi spike varieties in these six wheat varieties. Lodging capacity strength were: Liaomai18> Tainong18> Linmai4> Liangxing66 Jimai22> Shannong17.Morphological characteristics of Liaomai18:the maximum mechanical strength stems, the maximum amount of dry matter, the thickest stem wall.2. The most suitable density for varieties and lodging index in other densities. Jimai22,Liangxing66 are in the D-density achieved the highest yield, in dough stage, Jimai22 fivedensity lodging index were: E(254.00)>D(210.01)>C(195.65)>B(192.44)>A( 191.32),Lianging66; E( 269.75) >D( 210.9) >C( 178.24) >B( 160.61) >A(153.19), Jimai 22, Liang Xing 66 in E density magnitude 2 lodging, Jimai 22 milk ripe stage D density magnitude 1 lodging. Shannong 17 density in C achieved the highest yield,The lodging index dough stage Shannong 17 five density conditions respectively: E(1580.40)>D(738.41)>C(520.5)>B(457.67)>A(399.25). In D, E density of Shannong 17 occur in 2 above the level of the lodging. Explain: In the condition of soil fertility environment similar, like Jimai 22 multi spike type cultivar, can choose 15-18 million/ acre basic density of seeding can obtain higher yield; Large spike cultivars, three large spike type cultivar yield is increased with the increase of planting density becomes greater, yield the largest value are made in million / acre under sowing quantity, in dough stage, Liaomai18five-density lodging index were: E( 138.28) >D( 129.26) >C( 124.93) >B(122.27)>A(119.96), Tainong18 five-density lodging index were: E(86.91)>D(81.65)>C(78.34)>B(77.18)>A(75.43), Linmai4 five-density lodging index were:E(102.2)>D(99.38)>C(94.37)>B(93.98)>A(92.93). The condition of thisexperiment, three large spike type cultivar did not lodging place. Visible, large spike cultivars can be appropriately increased sowing quantity, in order to obtain a higher yield.3. Relationship between morphological traits and stalk variety lodging. For the multi spike type cultivar, differences of lodging analysis of various densities of the three species,The differences in the mechanical strength of the three varieties were significantly difference between, center of gravity height and stem fresh weight with the density change; Correlation analysis between lodging index of each period and three lodging traits, Correlation degree of the four period of the lodging index and three lodging traits not one, but with the mechanical strength of the maximum correlation, Correlation degree of the four period of the lodging index and three lodging traits not one, but with the mechanical strength of the maximum correlation, Internode length, significant correlation of three varieties of lodging index and inverted two internodes length, Shannong17 and Liangxing 66 lodging index except with inverted two internodes significantly related, but also significantly correlated with UI;Aspects of inverted two internodes of morphological characters. Dough stage, Jimai 22 lodging index and fresh weight, diameter significantly related, Shannong 17 lodging index and inner and outer diameter, dry weight was significantly related, Liangxing 66 lodging index and stem fresh weight, diameter significantly related.For large panicle type varieties, under the same conditions, the difference of mechanical properties of three cultivars were significantly. The fresh stem weight and center of gravity height change with density, growth period did not show a certain regularity; Correlation analysis of different growth period of three varieties of lodging index and G, H, S between traits,at the booting stage, the three characters together determine the size of the lodging index, Blossom period, mechanical strength mainly determines the lodging index, The milk stage, the three characters together determine the size of the lodging index, the Dough stage,the mechanical strength and the height of the center of gravity determines the size of the common lodging index. Internode length, all three varieties lodging index had significant positive correlation with the inverted two internodes. Dough stage, hand down section two morphological traits, Liaomai 18 lodging index and inverted section two of the fresh and dry weight, were significantly related to inner and outer diameter, Tainong 18 and two section diameter is not relevant, has strong correlation with other traits, Linmai 4 pour two section of inner and outer diameter, fresh and dry weight were significantly related.