A New Cultivation Technique of Cangmai 6005 for High Yield in Cangzhou Dry-alkali Land

Cangmai 6005 is a national wheat variety approved by Cangzhou Academy of Agriculture and Forestry Sciences,which has the characteristics of drought resistance,salt tolerance,high yield and stable yield. According to the characteristics of dry-alkali land in Cangzhou City and the variety characteristics,the new cultivation technique was completed.

The soybean PLATZ transcription factor GmPLATZ17 suppresses drought tolerance by interfering with stress-associated gene regulation of GmDREB5

Plant AT-rich sequence and zinc binding(PLATZ)transcription factors are a class of plant specific zincdependent DNA-binding proteins that function in abiotic stress response and plant development.In this study,31 GmPLATZ genes were identified in soybean.GmPLATZ17 was down-regulated by drought and exogenous abscisic acid.Transgenic Arabidopsis and soybean hairy roots overexpressing GmPLATZ17 showed drought sensitivity and inhibition of stress-associated gene transcription.In contrast,suppressed expression of GmPLATZ17 led to increased drought tolerance in transgenic soybean hairy roots.The GmPLATZ17 protein was verified to interact physically with the GmDREB5 transcription factor,and overexpression of GmDREB5 increased drought tolerance in soybean hairy roots.Interaction of GmPLATZ17 with GmDREB5 was shown to interfere with the DRE-binding activity of GmDREB5,suppressing downstream stress-associated gene expression.These results show that GmPLATZ17 inhibits drought tolerance by interacting with GmDREB5.This study sheds light on PLATZ transcription factors and the function of GmPLATZ17 in regulating drought sensitivity.

Effect of Different Processing Methods on Storage Quality of Strawberries

[Objectives]This study aimed to explore the effect of different processing methods on the storage quality of strawberries.[Methods]Strawberries purchased from Xintongtian Supermarket in Cangzhou City were used as the experimental material,and they were subjected to different processing methods:45℃hot air for 30 min,45℃hot water for 10 min and 3%calcium chloride for 1 min.[Results]The processing effect of 45℃hot water for 10 min was better than that of 45℃hot air for 30 min.The processing effect of 3%calcium chloride for 1 min was good.Hot water processing could prolong the time to begin to rot,obviously alleviate the increase in weight loss rate,and obviously alleviate the decrease of soluble solids and Vc contents of strawberry fruit.However,the ability of hot water to delay the decrease of strawberry fruit hardness was not as good as that of calcium chloride.[Conclusions]The strawberries processed with 45℃hot water for 10 min showed the best storage quality.

Control Effects of Trapping Lamps with Different Wavelengths on Soybean Pests

[ Objective] The aim was to compare control effects of trapping lamps with different wavelengths on soybean pests. [ Method ] Three kinds of lamps with different wavelengths were used to conduct pest control test in soybean fields. [ Result] The trapping effects of three kinds of lamps with different wavelengths on soybean pests were significantly different. Among them, the trapping effect of No. 2 light with wavelength of 400 -460 nm was significantly better than the other two lamps; No. 1 light with wavelength of 330 -400 nm had no obvious difference in trapping effect with No. 3 light with wavelength of 450 -510 nm. [ Conclusion] The research result provided theoretical basis for popularized application of trapping lamp in production.

Supporting Seeder and Planting Technology for Spring Corn in Arid Areas

The annual rainfall is low and the fresh water resources are scarce for the rainfed farming in dry zone of northern China,which seriously affects the sowing and growth of spring corn. In order to solve this problem,the technology of ridge-mulching and side-sowing of spring corn is put forward,the supporting compound operation seeder is developed,and the effect of different speed on the quality of sowing is tested and analyzed. Under the test conditions described in this paper,the seeding operation with a high speed( up to 6 km/h) can be realized,and the quality of the seeding operation can meet the requirements of the national standards. The application of this machine can solve the problem of " drought damage at the booting stage" for spring corn,thereby realizing the deep fusion of farming machine and agronomy in dry farming of northern China,and achieving the integration of farming machine and agronomy.

Comparison of Polysaccharides Content among Common Fruits

[Objectives]Polysaccharides in common fruits were determined and compared.[Methods]Polysaccharides in fresh bananas,apples,grapes and strawberries purchased from local markets were extracted using water extraction-alcohol precipitation method and determined using 3,5-dinitrosalicylic acid(DNS)method.[Results]The content of polysaccharides in banana was relatively high.The optimal conditions for DNS colorimetry were as follows:measurement wavelength of 510 nm,color developer of 1.0 mL,color development temperature of 90℃,color development time of 5min and stabilization time within 30 min.[Conclusions]The reproducibility and recovery rate of this method are ideal.It shows that the method is highly precise and is helpful for the research of fruit polysaccharides.This study provides a certain reference value for the development and application research of fruit polysaccharide resources in China.

Decomposition Method of Genetic Correlation Coefficient Based on NC Ⅱ Mating Design

There are different degrees of correlation between crop traits. The phenotypic correlation is decomposed into genetic and environmental correlation in quantitative genetics. In this paper,according to stochastic model of variance and covariance analysis,we calculate different genetic components,bring up a decomposition method of genetic correlation coefficient based on NC II mating design,and use examples to show analytic steps and interpret results.