Vol. 18 No. 4 (2020)

Field experiments were conducted in the Spring and Summer-autumn cropping seasons in 2018 in Do Thanh commune, Yen Thanh district, Nghe An province to determine the suitable fertilizer dose and direct seeding rate for new early maturity rice variety DCG72. The experiment included 4 dosesof fertilizers (50kg N + 37kg P2O5+ 37kg K2O/ha, 70kg N + 53kg P2O5+ 53kg K2O/ha, 90kg N + 68kg P2O5+ 68kg K2O/ha and 110kg N + 83kg P2O5+ 83kg K2O/ha)with 3 rates of direct seeding (40, 60 and 80kgseed/ha). Results showed that thedifferent treatments of fertilizer andseeding ratesignificantly influenced on the number of tillers/m2, leaf area index, number of panicles/m2and grain yield of DCG72, but did not remarkably affect on the number of filled-grain/panicle and the 1000-grain weight. The most suitable dose of fertilizer for DCG72 in the Spring cropping season was: 90kg N + 68kg P2O5+ 68kg K2O and in the Summer-autumn cropping season was: 70kg N + 53kg P2O5+ 53kg K2O. The most appropriatedirect seeding rate for both cropping seasons was 60kg of seed/ha/season.

The objective of this study was to evaluate the effects of intercropping mungbeanand sugarcane on several soil properties and sugarcane yield in acid sulfate soil in Long My district - Hau Giang province. The field experiment was a randomized complete block design including seven treatments. The combination of two varieties of mung-bean (CS-208 and DX-06) and three nitrogen levels (40, 60, 80kg N/ha) produced 6 treatments and control treatment as monocultural sugarcane, with four replications on each plot of 36m2.The results showed that two varieties of mungbean are suitable to intercropping with sugarcane. There was no significant difference in mung bean yield between nitrogen levels, but the treatment of intercropping mungbean with 80kg N/ha and sugarcane obtained higher sugarcane yield as compared to monocultural sugarcane. The intercropping of mungbean and sugarcane improved soil properties as organic matter, available ammonium concentration in top soil and higher sugarcane yield 21.7-24.7 tons/ha.

This study was carried on15 henDong Tao (ĐT) chicken and 15 hens F1 crossbred Dong Tao breed with Luong Phuong(LP)breed to evaluate the reproductive performance, feedconsumption to ten eggs, egg quality and fertility, hatchingduring 38 laying weeks. These hens were raised individually in battery cage and inseminated artificially. The egg weight and external egg quality were measured on 750 eggs from ĐThens and 1150 eggs from F1(ĐTxLP) hens. The hatching rates in both breeds were collected from 22 incubator runsfor each breed.The reproductive performance of F1(ĐTxLP) henswasbetter than that of ĐT hens.The laying percentage during 38 laying weeks averaged 40.29% forF1(ĐTxLP)hens, 17,98% higher than ĐThens. The total number of eggs laid during 38 laying weeks averaged 107.18 for F1(ĐTxLP) hens and 59.33 eggs for ĐThens. The FCR per 10 eggs ofF1(Dong Tao x Luong Phuong) hens was significantly lower than which calculated on Dong Tao chickens (P<0.001). The chicks malformationpercentage of F1hens (ĐTxLP)was 0.24% lower than thatof Dong Tao hens (1.26%)(P<0.05). The Luong Phuong chickenbreed can be usedto cross with Dong Tao to improve the exploitation and development genetic resources of Dong Tao chicken

This study was carried to determine the morphology and growth performance, productive meat quality of Tre chicken in TanYen district, BacGiang province and Faculty of Animal Science, Vietnam National University of Agriculture. Morphological characteristics were carried at one day of age (185 chicks), 20 weeks (137 chicks) and 38 weeks (105 chicks). Growth performance and meat quality were conducted on 135 Tre chickens from 1-24 weeks. Atday-old chicks had mostly black streak (49.73%)and at the 20 weeks, the plumage color of the hens was mostly brown (50.68%) and the feathers of the cockwere mostly yellow (59.38%). Day-old chick has an average weight 20.13g (male) and 18.13g (female). At 24 weeks, the body weight was 1013.57g (cocks) and 830g (hens). The average daily gain of Tre chickens gradually increased from 1 to 10 weeks and then decreased. The FCR from 1-24 weeks of age was 8.12. The research results indicatedthat Tre chickens have diverse phenotypes.Tre chickens were small, grown slowly, good ofcarcass yield and good quality of meat.

The study aimed to evaluate the effect of supplementation of cottonseed oil on feed intake, digestibility and enteric methane emission of dry cows. A total of 24 dry cows at 2-6thlactation cycles were used in the experiments. The experimental animals were allocated according to a completely randomized design (CRD) tofour groupswithsix replications. The experimental diets comprised basic diet supplemented with cottonseed oil at levels of 0%; 1.5%; 3.0% and 4.5% of DM intake corresponding to the diet of control, KP1.5; KP3.0 and KP4.5, respectively. Results showed that the supplementationof cottonseed oil at 1.5%-3.0% improved total ME intake (from 17.6% to 18.1%) comparedto those fed control diet. The supplementation levels also reduced the total methane emission and methane emission intensity (from 18.1% to 19.2% methane/kg DMI). It may therefore be concluded that the supplementation of cottonseed oil at 1.5%-3.0%DMIhas a beneficial effect on feed intake, digestibility of dry cow witha reduction in CH4emission.

This study aims to evaluate the orange production situation and determine the limit factors of soil for orange cultivation in Ham Yen district, Tuyen Quang province. The methods of interviewing households by surveying, soil analysis and inheriting land research results in Ham Yen were used.The results showedthat the land area for orange cultivation in 2018 was 7,270ha, increased 3.25 times, yield increased 2.41times, and production increased 5.68 times, compared with 2010. Inorganic fertilizer applied to orange was 2-3 times higher than the recommendation. The number of households applied organic fertilizer to orange was low (15.56%) with the amount equalled to 1/10 of recommendation amount. Orange is cultivated mainly on Yellowish red soil on the metamorphic rock, Yellowish red soil on shale and Light yellow soil on the sandy rock. The limit factors of soil for orange cultivation in Ham Yen are high slopecausing erosion (>15, occupied 82% of households); soil reaction wasvery acid (pHKCl= 3.2-4.0, 82.2%); low organic matter content, poor available phosphorous and potassium, poor exchangeable Ca++in soil, especially Yellowish red soil on the metamorphic rock was missing exchangeable Mg++; low micronutrient (Cu and Zn content) in Yellowish red soil on the metamorphic rock.

TCP transcription factor is considered as the key regulatory proteins, which are demonstrated to involve in the growth and development of plants. However, the information of TCP in pummelo (Citrus grandis) has been still lacking.The aims of this study were to identify and characterize the basic features of TCPs in pummelo. As the results,a total of 21 genes encoding TCP havebeen identified in the pummelo's genome. Based on various bioinformatics tools, the physic-chemical properties of TCP family in pummelo have beenfound to be very variable, hydrophilic, as confirmed in other plants-species. The majority of CgTCP genes consist ofonly one exon. We have also found that TCP in pummelo could classify into 3 plant-specific groups, including PCF1, CIN and CYC/TB1. Of our interest, according to the transcriptome atlas of the sweet orange (C. sinensis), we demonstrated that the homologous gene of CgTCP02 is strongly induced in leaf, flower and fruit. Taken together, our results could get insight into the TCP family in pummeloand initially evaluate the expression profiles of TCP-coding genes in the major organs, and thus, provide the candidate genes for further functional characterizations.

The objective of this study was to evaluate the current situation and determine the needs for training and retraining for civil servants in the internal Hanoiof Home Affairs since those are requisite for determining the quality and effectiveness for the next steps in the process of training and retraining for civil servants. The results indicated that the internalHanoi of HomeAffairs hascomplied with legal provisions to determine the needs alongside reasons for training and retraining civil servants of the internal Hanoiof Home affairs. However, the study also showed that the Hanoi ofHome affairs has not issued unified procedures as well as criteria for determining the training needs; The determination of the needs for training and retraining has not yet been close to the sector's scheme and training plans, as well as human resource development.

This study aims to assess the current disease management in chicken raising of the farm households in Yen Thedistrict, Bac Giang province. Both secondary data and primary data from farm household survey were used for this study and the main analytical methods include the descriptive statistics and comparative analysis.The results showed that most of the large-scale and medium-scale chicken raising households have actively applied the measures for disease management. Meanwhile, many small-scale households have not fully applied the measures, specifically in chick selection, raising house preparation, and feed selection. The major solutions for enhancing the disease management in chicken raising include the development of large-scale raising farm models, the enhancement of the propaganda and dissemination on measures for chicken diseases, better control of the private providers of veterinary services, and improvement of the policies for chicken raising in the district.