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The purpose of improving the water and fertilizer retention performance of Mu Us Sandy Land is to provide theoretical support for the ecological protection and high-quality development of the "Ji" bend of the Yellow River. In order to explore the improvement effect of coal gangue on Mu Us Sandy Land, in this study, switch grass was taken as the indicator plant, and the content of soil conditioners of coal gangue was set to 0%(CK), 90%(ST1), 84%(ST2), 78%(ST3), 66%(ST4), and 54%(ST5) by random block method. The effects of soil conditioners with different coal gangue content on soil properties and agronomic indexes of switch grass in Mu Us Sandy Land were studied. The results showed that adding coal gangue soil conditioners could effectively improve the physical structure of aeolian sand soil. Among them, compared with CK, under ST1 treatment, water content increased the most, by 41.36%. The bulk density of soil under ST3 treatment decreased by 19.91% compared with CK. ST4 treatment had the most significant improvement on the porosity of aeolian sand soil, the value increased by 5.31% compared with CK. The soil conditioners of coal gangue promoted the growth of switch grass on sandy land. Compared with CK, the application of coal gangue soil conditioners could significantly increase the plant height of switch grass. Among them, ST4 treatment had the most significant increase effect on the plant height of switch grass, it increased by 54.3% compared with CK; ST2 treatment had the most significant increase effect on the aboveground biomass of switch grass and ST3 treatment had the most significant increase effect on the underground biomass, compared with CK, the increase of the biomass was 75.60% and 83.17%, respectively. Principal component analysis showed that ST2 had the best score in the treatment groups of coal gangue soil conditioners compared with CK, and the score was 0.40. Therefore, the best proportion of coal gangue soil conditioner to improve soil properties in Mu Us Sandy Land was 84%. [ABSTRACT FROM AUTHOR]

Broomcorn millet is a gramineous herb with drought resistance, saline-alkali tolerance, barren tolerance, and short growth period. In order to provide candidate genes for stress resistance molecular breeding for broomcorn millet, in this study, on the basis of the previous transcriptome sequencing annotation genes, the NAC protein domain annotated on the chromosome 16 of the broomcorn millet genome was aligned to obtain the gDNA sequence of the PmNAC1 gene. The nucleotide sequence of the broomcorn millet was obtained by PCR amplification and gene cloning. The online software ORF Finder Blast were used to conduct bioinformatics analysis of the physical and chemical properties and structure of the protein encoded by broomcorn millet NAC. The results showed that the full length of the PmNAC1 gene was 1 634 bp, encoding 423 amino acids, without signal peptide and transmembrane structure. The amino acids in the secondary structure were mainly composed of 8 α-helix chains and 14 β-sheet chains, which were hydrophilic proteins. The conserved sites were 73-211 amino acids, and there were 59 phosphorylation sites. The glycosylation site exceeded the horizontal line of 0.5. The phylogenetic tree of NAC amino acid sequence of broomcorn millet transcription factor was constructed. The genetic relationship between PmNAC1 protein and switchgrass CUC2 was the closest, and the genetic variation coefficient of the two was 0.06. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Prataculturae Sinica is the property of Acta Prataculturae Sinica Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

【Objective】The present paper aimed to the effects of phosphorus application rate on switchgrass growth and soil nutrients in saline-alkali soil, in order to determine the appropriate amount of phosphorus, which provided a theoretical basis for saline-alkali soil improvement and high yield and high efficiency cultivation of switchgrass in Yinbei area of Ningxia.【Method】In Yinbei area of Ningxia, switchgrass, an energy crop, was used as material to study the effects of different treatments on the growth, soil saline-alkali content and nutrient absorption and utilization of switchgrass by setting 0,30 and 90 kg/hm² of phosphorus fertilizer（expressed as P0, P30 and P90, respectively） through field experiments.【Result】At the mature stage of switchgrass, the soil salinity and alkali content in 0-100 cm soil layer of each treatment were all P0>P30>P90, and the soil organic matter, available phosphorus and alkali-hydrolyzable nitrogen contents were all P90>P30>P0. Compared with P0, P90 treatment significantly reduced the soil salinity and alkali content and increased the nutrient content. Phosphorus application contributes to the growth of switchgrass, which promoted the absorption and utilization of nitrogen and phosphorus, and improved the accumulation of aboveground dry matter. Under three phosphorus levels, soil nitrogen balance of payments were deficit, and soil phosphorus balance was surplus only under P90 treatment.【Conclusion】The comprehensive results showed that under the conditions of this experiment, 90 kg/hm² P application rate could not only ensure the good growth of switchgrass and obtain high biomass yield, but also alleviate the saline-alkali pressure, improve the soil nutrient status and maintain a reasonable balance of nitrogen and phosphorus. [ABSTRACT FROM AUTHOR]

Copyright of Acta Agriculturae Zhejiangensis is the property of Acta Agriculturae Zhejiangensis Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Prataculturae Sinica is the property of Acta Prataculturae Sinica Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The Yellow River Delta has abundant reserve of land resources. Combining the marginal land development with biomass energy development is conducive to the rational utilization of land resources and the efficient and sustainable supply of biomass feedstock in this area. On the basis of depth analysis of soil and water resources and rural biomass energy utilization status in the Yellow River Delta, combining the domestic and international present situation on biological energy research and the latest progress, this paper discussed the necessity and feasibility of large-scale cultivation of energy plants like sweet sorghum, Jerusalem artichoke. ricinus communis and switchgrass in the saline alkali land, and proposed several key suggestions to promote the biomass energy development and marginal land utilization from the technical, policy, market, etc., which study has guiding significance for the scientific development of land and water resources in the Yellow River Delta. [ABSTRACT FROM AUTHOR]

Ensilage is a traditional way of preserving fresh biomass. However, in order to apply ensilage to the ethanol biorefinery, two parameters need to be evaluated: quantity and quality changes of the biomass; and its effects on bioconversion process. To study these two aspects, switchgrass harvested on three different time points (Early, mid and late fall) were used as feedstock. The early fall harvested biomass was ensiled at 5 moisture levels ranging from 30% to 70%. Silage of 40% moisture and 3 other raw switchgrass were pretreated with liquid hot water, followed by enzymatic hydrolysis as well as simultaneous saccharification and fermentation. After 21 days storage pH values of all silages decreased below 4.0 and the dry matter losses were less than 2.0%, and structural sugars contents did not change dramatically. Liquid hot water caused more hemicellulose dissolution in the silage than in unensiled switchgrass. However, ensilage also increased the risk of releasing more sugar degradation products; After enzymatic hydrolysis, silage obtained higher total glucose, xylose and galactose yields than raw materials; After simultaneous saccharification and fermentation, ethanol concentration in silage was 12.1 g/L, higher than the unensiled switchgrass (10.3 g/L, 9.7 g/L and 10.6 g/L for early, mid and late fall respectively). Our results suggest that ensilage helps increase pretreatment efficiency and sugar yield, which increases final ethanol production.