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利用滴灌系统施肥，要认真研究肥料的溶解性
利用滴灌系统施肥，要认真研究肥料的溶解性。不溶、溶解度低、或在某种条件下极易发生反应而形成沉淀的肥料均应该避免选用。
The solubility of fertilizer should be studied carefully when applying fertilizer in drip irrigation system. Fertilizers that are insoluble, have low solubility or are prone to react under certain conditions to form precipitation should be avoided.
大部分固态化肥包衣。为了避免包衣对滴灌系统产生堵塞，最好选取少量样品放入溶解罐中搅拌，然后观察包衣的溶解情况。如果溶解后包衣物质沉淀到罐底，在施用时，让注肥器吸取上层溶液，不要搅动肥料溶液整体。
Most solid fertilizers are coated. In order to avoid clogging the drip irrigation system by coating, it is better to select a small amount of samples and mix them in the dissolution tank, and then observe the dissolution of coating. If the coated substance precipitates to the bottom of the tank after dissolution, let the fertilizer injector absorb the upper solution while applying, and do not stir the whole fertilizer solution.
尿素，硝酸，硝酸钙，硝酸钾溶解时要吸收水中的热量，水的温度大幅降低。此时，溶解量可能达不到要求量。为了充分溶解，最好让溶液放几个小时，随着温度上升，其余未溶解部分会逐渐溶解，然后就可注入系统了。
When urea, nitric acid, calcium nitrate and potassium nitrate dissolve, they should absorb the heat in the water, and the temperature of the water decreases greatly. At this time, the solubility may not meet the requirements. In order to fully dissolve, it is better to let the solution stay for several hours. As the temperature rises, the remaining undissolved parts will gradually dissolve, and then can be injected into the system.
注入之前，先做观测试验，以便评估堵塞滴头可能性。有些肥料要溶入肥料1~2小时，才能看出是否有沉淀形成，沉淀量多少。如果溶入水中数小时，溶液仍呈浑沌状，则有可能堵塞滴灌系统。如果数种肥料同时施，应在注入系统之前去取样，以实际比例同时放入观察罐中观察混合后的溶解情况，然后决定是否同时注入。
Before injection, an observation test is performed to assess the possibility of blocking the emitter. Some fertilizers need to be dissolved in the fertilizer for 1 to 2 hours before we can see whether there is precipitation and how much precipitation there is. If the solution is still chaotic after several hours, it may block the drip irrigation system. If several kinds of fertilizers are applied at the same time, they should be sampled before being injected into the system, put into the observation tank at the same time in actual proportion to observe the dissolution after mixing, and then decide whether to inject at the same time.
The solubility of fertilizer should be studied carefully when applying fertilizer in drip irrigation system. Fertilizers that are insoluble, have low solubility or are prone to react under certain conditions to form precipitation should be avoided.
大部分固态化肥包衣。为了避免包衣对滴灌系统产生堵塞，最好选取少量样品放入溶解罐中搅拌，然后观察包衣的溶解情况。如果溶解后包衣物质沉淀到罐底，在施用时，让注肥器吸取上层溶液，不要搅动肥料溶液整体。
Most solid fertilizers are coated. In order to avoid clogging the drip irrigation system by coating, it is better to select a small amount of samples and mix them in the dissolution tank, and then observe the dissolution of coating. If the coated substance precipitates to the bottom of the tank after dissolution, let the fertilizer injector absorb the upper solution while applying, and do not stir the whole fertilizer solution.
尿素，硝酸，硝酸钙，硝酸钾溶解时要吸收水中的热量，水的温度大幅降低。此时，溶解量可能达不到要求量。为了充分溶解，最好让溶液放几个小时，随着温度上升，其余未溶解部分会逐渐溶解，然后就可注入系统了。
When urea, nitric acid, calcium nitrate and potassium nitrate dissolve, they should absorb the heat in the water, and the temperature of the water decreases greatly. At this time, the solubility may not meet the requirements. In order to fully dissolve, it is better to let the solution stay for several hours. As the temperature rises, the remaining undissolved parts will gradually dissolve, and then can be injected into the system.
注入之前，先做观测试验，以便评估堵塞滴头可能性。有些肥料要溶入肥料1~2小时，才能看出是否有沉淀形成，沉淀量多少。如果溶入水中数小时，溶液仍呈浑沌状，则有可能堵塞滴灌系统。如果数种肥料同时施，应在注入系统之前去取样，以实际比例同时放入观察罐中观察混合后的溶解情况，然后决定是否同时注入。
Before injection, an observation test is performed to assess the possibility of blocking the emitter. Some fertilizers need to be dissolved in the fertilizer for 1 to 2 hours before we can see whether there is precipitation and how much precipitation there is. If the solution is still chaotic after several hours, it may block the drip irrigation system. If several kinds of fertilizers are applied at the same time, they should be sampled before being injected into the system, put into the observation tank at the same time in actual proportion to observe the dissolution after mixing, and then decide whether to inject at the same time.
