Study On The Application Effect Of Humic Acid Fertilizer In Several Fruit Trees And Crops

Humic acid fertilizer was an organic compound fertilizer rich in humic acid substances which is chemically synthesized from natural organic matter such as peat,lignite and weathered coal and mineral elements.And it has a significant effect on stimulating crop growth,enhancing stress resistance,improving chemical fertilizer utilization,and perfecting soil properties.Furthermore,this kind of fertilizer plays a key role in improving crop yield and quality.Thus,humic acid fertilizer is of great significance to the growth of ecological agriculture and green agriculture in China.Therefore,in order to study the application of humic acid fertilizer in agricultural production,this experiment took solid fertilizer and foliar fertilizer of ore source humic acid as test materials to study their influence on yield and quality for different crops under different application dosage and their influence on physical and chemical properties of different soils.The main findings are as follows:(1)The humic acid foliar fertilizer can increase the yield and quality of kiwifruit during the fruit-bearing period of“Xuxiang”kiwifruit.However,too high or too low concentration of fruit cannot optimize the fruit yield and quality.And when the concentration was 0.34 g/L,the yield was 24493.65 kg/hm2 at its highest value,the yield was increased by 2729.55 kg/hm~2,the rate of which was 12.5%.And when the concentration was 0.3 g/L,the single fruit reaches its maximum value,which was 8.35 g higher than that of non-humic acid fertilizer.When the concentration was 0.31 g/L,the soluble sugar content of the fruit peaks at 17.74%,which was 4.18%higher than that without humic acid treatment.And when the concentration was 0.36 g/L,titrate acid concentration reaches its lowest value at 1.08%;and when the concentration was 0.31 g/L.The ratio of sugar to acid was 16.14,which was 6.05 higher than that of non-humic acid fertilizer;the highest concentration of dry matter was 0.37 g/L;when the concentration was0.32 g/L,the highest content of vitamin C reaches the peak at 189.95 mg/100g,which increased by 40.47 mg/100g than non-humic acid fertilizer.(2)Humic acid foliar fertilizer can increase apple yield and improve appearance and nutritional quality during the fruit-sustaining period of“Red Fuji”apple.There was a significant secondary correlation between the application rate of humic acid foliar fertilizer and apple yield.When the concentration was 0.52 g/L,the yield was the highest,which was32767.50 kg/hm~2,and the yield increased by 8617.65 kg/hm~2,and the yield rate increased by 26.3%.The fruit hardness of 0.40 g/L was reduced by 2.74 kg/m~2,and the ratio of the maximum transverse diameter of 90 mm or more was 40.25%.At the concentration of 0.39g/L,the soluble sugar content was the highest,11.64%,increasing by 2.48%;the concentration of 0.38 g/L was the lowest titratable acid content;the concentration of 0.39g/L was the highest,the ratio of sugar to acid was 42.86;the concentration was 0.59.At g/L,the dry matter content was up to 16.31%,an increase of 3.35%;at a concentration of 0.45g/L,the vitamin C content was the highest,which was increased by 13.65 mg/100g.(3)The application of humic acid fertilizer on bauxite increased the yield of winter wheat and its yield components.And when be treated with 800 kg/hm~2 dosage,it represents in best condition with the yield of 4851.93 kg/hm~2,which increased by 14.7%.And when be treated with 1600 kg/hm~2,the wheat spikes reaches its maximum value and increase by21.91/m~2.And when be treated with 800 kg/hm~2,it reaches its highest number with 34.42per ear,which increased by 2.18 per ear;the heaviest 1000-grain weight can be got when the dosage was 800 kg/hm~2,which was 41.85 g,an increase of 1.56 g.And humic acid fertilizer can also improve soil physical and chemical properties.And soil solubility bottoms out at 1600 kg/hm~2 of 1.18 g/cm~3 which was 0.17 g/cm~3 lower than that of non-humic acid treatment.The total porosity of 1600 kg/hm~2 was the highest,which was50.77%.And when the soil volume was 1600kg/hm~2,the water holding capacity was the highest,reaching 28.03%,which was 5.65%higher than that without fertilizing humic acid fertilizer.The effect of increasing total nitrogen content in soil was not obvious;the highest available phosphorus content was the dosage of 1200 kg/hm~2,which was 25.66 mg/kg,and which was 4.22 mg/kg higher than that without humic acid fertilizer,and increased by19.7%;At tie same time,when the dosage was 1600 kg/hm~2,potassium content reaches its highest at 127.25 mg/kg,an increase of 12.55 mg/kg,an enhancement of 10.9%;and the soil pH decreased by 0.13 to 0.19.(4)Applying humic acid fertilizer on aeolian sandy soil,the highest yield was 800kg/hm~2,which was 41438.36 kg/hm~2,and the yield increased by 10817.78 kg/hm~2,the yieldrate increased by 35.3%;the number of single potato chips increased by 0.37~0.76,and the average potato weight per plant at 1200 kg/hm~2 was the highest,reaching 4.33;the single tuber with dosage of 800 kg/hm~2 was the highest,reaching 158.99 g,an increase of 21.76 g.The soil bulk density of 1600 kg/hm~2 was the lowest,1.32 g/cm~3,which decreased by 7.69%.The porosity and saturated water content of 1600 kg/hm~2 were lower than other treatments.The total void fraction was 44.79%,an increase of 6.28%.The water volume reached 31.15%,an increase of 5.57%.The soil organic matter content of 1600kg/hm~2 was the highest,reaching 3.41g/kg,which increased by 2.05 g/kg compared with no humic acid fertilizer.The total nitrogen content of soil increased by 0.06~0.32 g/kg,and the total nitrogen content of 1600 kg/hm~2 was the highest,reaching 0.80 g/kg,which was increased by 65.5%.The total nitrogen content of 1200 kg/hm~2 was 0.78 g/kg,which was improved 60.3%,the total nitrogen content of 800 kg/hm~2 was increased by 35.0%;the soil available phosphorus of 1200 kg/hm~2 was the highest,7.89 mg/kg,an increase of 2.55mg/kg,an increase of 47.8%;the dosage was 1600 kg/hm~2 has the highest available potassium content,which was 0.83 mg/kg less than humic acid fertilizer.The soil pH decreased by 0.53~0.83,and the pH of 1600 kg/hm~2 was the lowest.