Effects Of Application Time And Dosage Of Stalk Reinfocing Agent On Rice Yield And Lodging Resistance Of Rice

The lodging of production is an important factor limited the high yield of rice,and the lodging is also caused the quality of rice to become inferior.In order to seek Influence of rice high yield and Lodging resistance,the team to seedling strengthening agent,quick-acting silicon fertilizer and biomass carbon as raw materials in accordance with a certain proportion of mixed and developed rice strong stalk lodging resistant preparation agent,named stalk reinforcing agent.In this study,Nanjing 9108 and Yongyou 2640 were selected as tested varieties,The test time was set for 3 times,respectively,for the inverted 5 leaves,inverted 4 leaves and inverted 3 leaves,in the same application period set up under the five kinds of dosage,Respectively,7.5 kg/hm2,15 kg/hm2,22.5 kg/hm2,30 kg/hm2 and 37.5 kg/hm2,and set the application of non-stalk reinforcing agent as a control.The effects of different application periods and application rates on rice yield and plant lodging resistance were studied,In order to elucidate the best application period and the appropriate dosage of the strong preservative of rice.The main results were as follows:1.The yield of rice varieties showed a decreasing trend with the delay of application period.With the increase of application amount,the yield of rice increased first and then decreased.Nanjing 9108 and Yongyou 2640 had the largest increase in the amount of 22.5 kg/hm2 in inverted 5 leaf stage,inverted 4 leaf stage and inverted 3 leaf stage,increased 6.1%and 5.6%,3.6%and 4.2%,2.1%and 3.2%respectively.For yield components,the number of grains per panicle,seed setting rate and grain weight per plant were increased compared with the control.2.The stalk reinfocing agent has a certain effect on the lodging resistance of rice,the stalk reinfocing agent can shorten the internode length of the plant base,increase the thickness of the base section and the thickness of the stem wall,increase the quality of the base section and improve the bending resistance of the plant base section.Apply the stalk reinforcing agent to the inverted 5 leaf stage and 30 kg/hm2 dosage,two varieties of rice base 1,2,3 knuckle between the bending effect of the effect is obvious,among them,the maximum bending strength of Nanjing 9108 increased by 20.01%,Yongyou 2640 bending strength increased by 23.14%.3.The effect of reinforcing agent application on the tiller dynamics of rice showed that the number of tillers decreased with the delay of application period,at the same time,with the increase of the amount,the number of tillers increased first and then decreased,to 15 kg/hm2 dosage increase effect is obvious.Leaf area index had no significant difference in the application period,with the increase in the amount,the leaf area index first increased and then decreased.Application of stalk reinforcing agents can increase the amount of dry matter accumulation,early increase in the slow,late increase faster,and in the mature to maintain a high amount of dry matter accumulation,with the delay of the application period,the amount of dry matter accumulation gradually decreased,amount of dry matter accumulation in the same application period increased first and then decreased with the increase of dosage.4.After application of the stalk reinfocing agent,the rice plant canopy leaf growth is compact,received light attitude is better,leaf base angle is small,bend degree small,the leaf base angle of the canopy leaf decreased,transmittance increased,help to improve the group's light attitude.After application of stalk reinfocing agent,in addition to the growth of plant height of inverted 5-leaf stage,the other two application period were reduced in plant height,plant height with the increase in the amount of increase first and then reduce,The effects of Increased plant height with 22.5 kg/hm2 was significant.