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我省钾肥的试验研究以往搞得不多,报导的材料也较少,为此,我们在一九八一年,分析了滇中地区主要土壤类型的全钾和速效钾含量,同时测定了在水稻整个生育过程中土壤速效钾的动态供应变化。根据所得结果,在含钾量不同的土壤上,布置了钾肥施用方法和施用时期的试验。一、试验设计和方法选择前作为小麦、含钾量高的红泥田与前作为蚕豆、含钾量中等的泥田和滇中地区主要土壤类型与高、中、低产田土壤作为试验研究对象。试验处理如下: 1.对照(不施钾肥)。 2.基肥(水皮肥)kcl 8公斤/亩。 3.穗肥kcl 8公斤/亩。 4.粒肥kcl 8公斤/亩。 5.基肥kcl 4公斤+穗肥kcl4公斤/亩。 6.基肥kcl4公斤+穗肥kcl 2公斤+粒肥kcl 2公斤/亩。上述各处理小区面积为0.03亩,重复三
In the past, experimental research on potash fertilizer in our province was not done much and the reported materials were few. Therefore, in 1981, we analyzed the total and available potassium contents of major soil types in central Yunnan. Meanwhile, Dynamic Changes of Soil Available K in Paddy During Whole Growth. According to the results obtained, potassium-based fertilizers were applied to different soil types and tested during the application period. I. Experimental design and method As the main soil type and high, middle and low yield soil of red muddy field with high potassium content and wheat field with medium potassium content before the selection as the experiment design and method, the soil with medium potassium content was selected as the experimental research object. Test treatment as follows: 1. Control (no potassium fertilizer). 2 basal (water skin fat) kcl 8 kg / mu. 3. Spike fat kcl 8 kg / mu. 4. Granules kcl 8 kg / mu. 5 basal kcl 4 kg + spike fat kcl4 kg / acre. 6 basal kcl4 kg + panicle fertilizer kcl 2 kg + grain fertilizer kcl 2 kg / mu. The above-mentioned processing area of 0.03 acres, repeat three