冀东水稻田施用生化有机肥效果初探

2004年,在滨海盐碱稻田进行了基施生化有机肥示范试验,水稻基施生化有机肥50～60kg/667m 2,土壤肥力持久,可以明显减少化肥用量,提高水稻的抗逆能力和产量,处理区水稻增产7.6%～11.9%。水稻施用生化有机肥后,可少施化肥30kg/667m2。

天源生化有机液肥在巨峰葡萄上的应用

天源生化有机液肥在巨峰葡萄上的应用李伟１）张建铭１）王梅珍２）（１）宣城地区农科所，芜湖２４１００２；２）芜湖市鸠江区农技站，芜湖２４１０００）１材料与方法天源生化有机肥（简称天源肥）由安徽省农科院园艺研究所提供。试验在宣城地区农科所葡萄园进行。供试...

Effects of Biological Organic Fertilizer on Flue-cured Tobacco Chemical Composition

Through field experiment,special biological fertilizer and cake fertilizer were applied collectively to tobacco,and chemical compositions of Wanxi flue-cured tobacco leaves were researched.The results showed that the increase of biological organic fertilizer would significantly improve soil nutrient supplying capacity.Compared with conventional fertilization,the contents of reducing sugar,total sugar and starch in different parts of tobaccos which were applied with biological organic fertilizer were closer to standards of excellent tobacco.In the treatment,the ratio of reducing sugar and nicotine in tobacco was more suitable in middle and lower parts of the plant and the contents of total N,nicotine and chlorine in tobacco were lowered,improving tobacco quality.

百事灵通

一句话信息 根据农业部发布的行业标准中关于渔用药物使用准则的要求,硝酸亚汞、醋酸汞、孔雀石绿、六六六、滴滴涕、磺胺脒(磺胺胍)、新霉素7种药物为禁用渔药。 到今年年底,河北省畜牧业生产将一律实施舍饲圈养,严禁散养放牧。

Effects of Organic Fertilizer on Fruit Quality and Acidified Soil Chemical Properties in Yantai Orchard

[Objective] This study aimed to investigate the improving effect of organic fertilizer on acidified soil as well as their effects on fruit quality and quantity in Yantai orchard.[Method] Plot experiment was conducted to investigate the effects of organic fertilizer on fruit yield and quality of Red Fuji and chemical properties of acidified soil.[Result] The apple yield in acidified soil applied with organic fertilizer all increased.Under the application of biological organic fertilizer,the apple yield was higher,and it was 8.92% higher than that in the control group.Under the mixed application of chemical fertilizer and biological organic fertilizer,the growth and development of apple trees were improved,and the total soluble solid(TSS) content,vitamin C(Vc) content and TSS-acid ratio in mature apples all increased.The application of organic fertilizer significantly reduced soil acidity.Compared with those in the control group,the soil p H value,organic matter content and alkali-hydrolyzable nitrogen content under the application of biological organic fertilizer were increased by 8.33%,15.10% and 30.80%,respectively.[Conclusion] The application of biological organic fertilizer could improve the yield of apple in acidified soil.

Chemical and Biological Evaluation of Maturity of Pig Manure Compost at Different C/N Ratios

Aerobic static pile composting (mechanical turning every 3 days) of pig manure was prepared at & m3 windrow heaps. Sawdust was used as the bulking agent to provide additional carbon and to increase the porosity of the substrate. Two treatments at initial C/N ratios of 30 and 15, respectively, were designed in the study. Dissolved organic carbon (DOC), soluble NH+4-N, C/N ratios in solid and aqueous phases, E4/E6 ratios, and seed germination index (GI) were determined to evaluate the maturity of the co-composts. Seed germination index, a biological parameter, was suggested as one of the most reliable maturity indicators for organic compost. The results showed that the treatment at the initial C/N ratio of 30 reached maturity after 49 days of composting; however, the treatment at the initial C/N ratio of 15 should require composting time of longer than 63 days to obtain maturation. Chemical multi-indicator evaluation was necessary, and the GI measurement was the recommended approach for maturity evaluation in the study.

Dynamic Relationship Between Biologically Active Soil Organic Carbon and Aggregate Stability in Long-Term Organically Fertilized Soils

Biologically active soil organic carbon （BASOC） is an important fraction of soil organic carbon （SOC）, but our understanding of the correlation between BASOC and soil aggregate stability is limited. At an ecological experimental station （28° 04＇-28° 37＇ N, 116° 41＇-117° 09＇ E） in Yujiang County, Jiangxi Province, China, we analyzed the dynamic relationship between soil aggregate stability and BASOC content over time in the red soil （Udic Ferrosols） fertilized with a nitrogen-phosphorus-potassium chemical fertilizer （NPK） without manure or with NPK plus livestock manure or green manure. The dynamics of BASOC was evaluated using CO2 efflux, and soil aggregates were separated according to size using a wet-sieving technique. The soils fertilized with NPK plus livestock manure had a significantly higher content of BASOC and an improved aggregate stability compared to the soils fertilized with NPK plus green manure or NPK alone. The BASOC contents in all fertilized soils decreased over time. The contents of large aggregates （800-2 000 μm） dramatically decreased over the first 7 d of incubation, but the contents of small aggregates （〈 800 μm） either remained the same or increased, depending on the incubation time and specific aggregate sizes. The aggregate stability did not differ significantly at the beginning and end of incubation, but the lowest stability in all fertilized soils occurred in the middle of the incubation, which implied that the soils had a strong resilience for aggregate stability. The change in BASOC content was only correlated with aggregate stability during the first 27 d of incubation.