Effects of Grape Balanced Nutrition Fertilizer on Yield and Quality of Wine Grapes

In this study,the wine grapes balanced nutrient fertilizer(BNF)was designed according to the wine grape nutritional requirements in different growth stages,and objected to reduce fertilizer application rate of wine grape cultivation,improve fertilizer utilization rate,achieve stable yield and improve the quality of wine grapes.The experiment was carried out at the Great Wall Sanggan Winery,and the Aristocratic Winery.The experiment was designed with two treatments:Namely BNF treatment,and the traditional fertilization(CK).We investigated the effects of BNF on the quality of wine grapes by examining the plant traits of wine grapes in different experimental areas during the growing season,the fruit traits at maturity,and determined the contents of VC,organic acids,amino acids,flavonoids,soluble total sugars,soluble solids,tannins,total phenols and catechins.The results show that:①The application of grape BNF greatly reduced the application amount of nitrogen,phosphorus and potassium,while the vine had no fertilizer deficiency phenomenon;②It increased the single fruit weight,the ear weight and yield to varying degrees,and the yield increase range was between 12% and 41%;③The wine grapes with BNF had the following characteristics:tight infructescence,even color,small fruit less,no fruit dropped,strong fruit colloid feeling,better aroma and taste;④It greatly improved the quality of wine grapes,and increased the content of soluble solids,soluble total sugar,organic acids,VC,total phenols,flavonoids,amino acids and tannins in fruits;⑤It greatly increased the total catechin content of"Riesling"and"Syrah",and had no significant effects on the catechin content of"Merlot"and"Cabernet Sauvignon".In summary,the application of grape BNF has certain practical significance for guiding the production of local wine grapes,ensuring the yield while improving the quality,increasing the income and reducing the environmental pollution caused by excessive fertilization.

Balanced Nutrition Practiced with Limitations during the COVID-19 Pandemic: The Experience of Teachers in Subang District, West Java, Indonesia

The purpose of the study is to assess the knowledge on Balanced Nutrition and its practices among pre-school teachers in Subang district, West Java, Indonesia before and during the COVID-19 pandemic (before March 2020 vs. October 2021) and to seek differences in the knowledge and practices of teachers who attended nutrition training and those who did not attend any nutrition training. We evaluated the knowledge and practice of 142 teachers based on 10 messages of the 2014 Indonesian Balanced Nutrition Guidelines, using google online survey platform. The top three messages mostly selected by the teachers were consuming a variety of staple foods (87%), drinking adequate and safe water (87%), and eating plenty of vegetables and fruits (86%), while the least selected were enjoying a variety of foods (41%) and reading food labels (28%). A slight increase was found in teachers who consumed fruits daily, while the practice of washing hands before and during the pandemic was statistically and significantly increased (58% to 72%;p < 0.05). A slight decrease was found in teachers who consumed vegetables and animal protein, as well as performed physical exercise daily. Majority of teachers (80%) participated in some kinds of nutrition training in the last four years. The top three gaps of knowledge between trained and non-trained teachers were on physical activity and maintaining ideal body weight (64% vs. 33%;statistically significant at p < 0.05);limit intake of sweet, salty, and fatty food;and consuming high protein food, with the range between 20 to 35 percentage points. We concluded that teachers acquired knowledge on nutrition to some degree, but its application faced limitations during the pandemic. Dissemination of Balanced Nutrition should continue.

Effects of Fertilizers with Different Proportions of N, P and K on Citrus Fruit Cracking

[Objective] The aim was to explore fertilizers with different proportions of N, P and K on citrus fruit cracking and to seek best treatment in preventing fruit cracking. [Method] Compound fertilizers with different proportions of N, P and K were prepared, supplemented by leaf fertilizers with varying mineral elements. [Result] It is proved the treatment II containing spring fertilizers （N：P2O5：K2O=20：10：10）, summer fertilizers （N：P2O5：K2O=16：8：16）, and leaf fertilizers with calcium nitrate solu- tion （0.5%） achieved the best prevention effects of fruit cracking. In the meantime, N-to-K ratio and N-to-Ca ratio were proved of positive correlation with cracked fruits, and the higher the ratios, the higher the proportion of cracked fruits, vice versa. On other hand, Ca-to-K ratio was of negative correlation with cracked fruits, and the higher the ratio, the lower the proportion of cracked fruits. [Conclusion] In practical production, fertilization should be conducted as per soil moisture content, tree growth, and seasons, in a balanced and comprehensive way.

Effect of Different Fertilizing Methods on Zinc Nutrition in Zn-Deficiency Apple Trees

Red Fuji apple trees of Zn-deficiency were used as material in the experiment. The effect of different Zn application methods on the regularity of Zn transportation and nutrition was studied. It was found that the storage of Zn in the branches was greatly increased by foliar application of the solution of 15% ZnSO4·7H2O before abscission. It had advantage to keep suitable Zn content in leaves, branches and roots, as well as between Zn and P and K, which increased Zn transportation and reusability. Zn content in roots increased when Zn was used in soil in autumn. However, the absorbed Zn did not transport to the top of the plant. It was used by the plant next year. Foliar application of ZnSO4·7H2O at early stage of the plant growth enhanced Zn content of the branch. However, the effect was kept for a short time. It had little effect on Zn transportation when Zn was sprayed three weeks after blossoming.