[Objective] The effects of Dongshengbao liquid organic fertilizer on soil im- provement of continuous cropping cucumber and the growth conditions of the cu- cumber were studied to provide the scientific basis for solv...[Objective] The effects of Dongshengbao liquid organic fertilizer on soil im- provement of continuous cropping cucumber and the growth conditions of the cu- cumber were studied to provide the scientific basis for solving the problem of con- tinuous cropping of vegetable soil. [Method] The soil of continuous cropping was sampled. The soil EC, pH, nutrient contents and cucumber height, dry weight of aboveground part and leaf area etc were studied with the method of potted cucum- ber test. [Result] Soil EC applied by Dongshengbao liquid organic fertilizer reached 0.93 mS/cm, and decreased by 27.91% compared with the contrast. Soil pH reached 5.89, and increased with 0.86% compared with the contrast. Dry weight of aboveground part, plant height and leaf area of cucumber were increased by 283.08%, 242.12% and 254.02% compared with the contrast. The incidence rank of cucumber Didymella bryoniae was below grade 2. Soil EC applied by compound fertilizer reached 1.53 mS/cm, and increased by 18.6% compared with the contrast. Soil pH reached 5.09, and decreased by 12.84% compared with the contrast. Dry weight of aboveground part, plant height and leaf area of cucumber were increased by 32.31%,-37.24% and 26.20% compared with the contrast. The incidence rank of cucumber Didymella bryoniae was above grade 2. [Conclusion] The organic fertilizer could solve the problems of soil salinization and soil acidification of continuous crop- ping, improve the resistance ability of Didymella bryoniae and promote the plant growth.展开更多
It is undeniable that wireless communication technology has become a very important component of modern society. One aspect of modern society in which application of wireless communication technologies has tremendous ...It is undeniable that wireless communication technology has become a very important component of modern society. One aspect of modern society in which application of wireless communication technologies has tremendous potential is in agricultural production. This is especially true in the area of sensing and transmission of relevant farming information such as weather, crop development, water quantity and quality, among others, which would allow farmers to make more accurate and timely farming decisions. A good example would be the application of wireless communication technology to transmit soil moisture data in real time to help farmers make irrigation scheduling decisions. Although many systems are commercially available for soil moisture monitoring, there are still many important factors, such as cost, limiting widespread adoption of this technology among growers. Our objective in this study was, therefore, to develop and test an affordable wireless communication system for monitoring soil moisture using Decagon EC-5 sensors. The new system uses Arduino-compatible microcontrollers and communication systems to sample and transmit values from four Decagon EC-5 soil moisture sensors. Developing the system required conducting lab calibrations for the EC-5 sensors for the microcontroller operating in either 10-bit or 12-bit analog-to-digital converter (ADC) resolution. The system was successfully tested in the field and reliably collected and transmitted data from a wheat field for more than two months.展开更多
The objective of this study was to evaluate the effects of elemental sulphur （S） and farmyard manure on soil pH, EC and N, S, P concentrations of tomato grown in a calcareous sandy loam soil. For this purpose, a pot...The objective of this study was to evaluate the effects of elemental sulphur （S） and farmyard manure on soil pH, EC and N, S, P concentrations of tomato grown in a calcareous sandy loam soil. For this purpose, a pot experiment was conducted in greenhouse conditions. Sulphur was applied at 0, 50, 100, 150, 200, 400 mg kg~ and farmyard manure at 0, 3 ton da^-1 to the soil. Three weeks after applications, tomato seedlings were planted and 8 weeks later, the plants were harvested to determine N, S, P concentrations and dry matter yield. Soil pH and EC were determined in the soil samples taken at 3 different periods. Effects of sulphur and farmyard manure applications were not significant on N, P concentrations and dry matter yield of tomato plant. S concentration of tomato plant was increased by sulphur alone. Soil pH was decreased and soil EC was increased in both 2^nd and 3^rd soil sampling period by the sulphur applications. As a result of farmyard manure application, soil pH decreased in the 2^nd soil sampling period but increased in the 3^rd soil sampling period. Also, soil EC was significantly increased in 1^st and 3^rd soil sampling period. Farmyard manure had no significant effect on S supply to tomato plant. The N：S ratio of tomato plant was decreased by sulphur alone. However, the sulphur with farmyard manure applications decreased N：S ratio in lesser extend compared to the S applications.展开更多
基金Supported by Jiangsu Agricultural Technological Promotion Program(TG(14)007)Changshu Scientific and Technological Development Plan(CN[2014]01,CN2014C10)+1 种基金Jiangsu Agricultural Three New Program(SXGC[2014]081)China Spark Program(S2015C100048)~~
文摘[Objective] The effects of Dongshengbao liquid organic fertilizer on soil im- provement of continuous cropping cucumber and the growth conditions of the cu- cumber were studied to provide the scientific basis for solving the problem of con- tinuous cropping of vegetable soil. [Method] The soil of continuous cropping was sampled. The soil EC, pH, nutrient contents and cucumber height, dry weight of aboveground part and leaf area etc were studied with the method of potted cucum- ber test. [Result] Soil EC applied by Dongshengbao liquid organic fertilizer reached 0.93 mS/cm, and decreased by 27.91% compared with the contrast. Soil pH reached 5.89, and increased with 0.86% compared with the contrast. Dry weight of aboveground part, plant height and leaf area of cucumber were increased by 283.08%, 242.12% and 254.02% compared with the contrast. The incidence rank of cucumber Didymella bryoniae was below grade 2. Soil EC applied by compound fertilizer reached 1.53 mS/cm, and increased by 18.6% compared with the contrast. Soil pH reached 5.09, and decreased by 12.84% compared with the contrast. Dry weight of aboveground part, plant height and leaf area of cucumber were increased by 32.31%,-37.24% and 26.20% compared with the contrast. The incidence rank of cucumber Didymella bryoniae was above grade 2. [Conclusion] The organic fertilizer could solve the problems of soil salinization and soil acidification of continuous crop- ping, improve the resistance ability of Didymella bryoniae and promote the plant growth.
文摘It is undeniable that wireless communication technology has become a very important component of modern society. One aspect of modern society in which application of wireless communication technologies has tremendous potential is in agricultural production. This is especially true in the area of sensing and transmission of relevant farming information such as weather, crop development, water quantity and quality, among others, which would allow farmers to make more accurate and timely farming decisions. A good example would be the application of wireless communication technology to transmit soil moisture data in real time to help farmers make irrigation scheduling decisions. Although many systems are commercially available for soil moisture monitoring, there are still many important factors, such as cost, limiting widespread adoption of this technology among growers. Our objective in this study was, therefore, to develop and test an affordable wireless communication system for monitoring soil moisture using Decagon EC-5 sensors. The new system uses Arduino-compatible microcontrollers and communication systems to sample and transmit values from four Decagon EC-5 soil moisture sensors. Developing the system required conducting lab calibrations for the EC-5 sensors for the microcontroller operating in either 10-bit or 12-bit analog-to-digital converter (ADC) resolution. The system was successfully tested in the field and reliably collected and transmitted data from a wheat field for more than two months.
文摘The objective of this study was to evaluate the effects of elemental sulphur （S） and farmyard manure on soil pH, EC and N, S, P concentrations of tomato grown in a calcareous sandy loam soil. For this purpose, a pot experiment was conducted in greenhouse conditions. Sulphur was applied at 0, 50, 100, 150, 200, 400 mg kg~ and farmyard manure at 0, 3 ton da^-1 to the soil. Three weeks after applications, tomato seedlings were planted and 8 weeks later, the plants were harvested to determine N, S, P concentrations and dry matter yield. Soil pH and EC were determined in the soil samples taken at 3 different periods. Effects of sulphur and farmyard manure applications were not significant on N, P concentrations and dry matter yield of tomato plant. S concentration of tomato plant was increased by sulphur alone. Soil pH was decreased and soil EC was increased in both 2^nd and 3^rd soil sampling period by the sulphur applications. As a result of farmyard manure application, soil pH decreased in the 2^nd soil sampling period but increased in the 3^rd soil sampling period. Also, soil EC was significantly increased in 1^st and 3^rd soil sampling period. Farmyard manure had no significant effect on S supply to tomato plant. The N：S ratio of tomato plant was decreased by sulphur alone. However, the sulphur with farmyard manure applications decreased N：S ratio in lesser extend compared to the S applications.
