Generally, the diameter of organic melon fruit relatively short （the fruit is small）, weight of fruit just as big as 1.25-1.49 kg only, while weight of inorganic melon fruit can reach 2-3 kg. The research was conduc...Generally, the diameter of organic melon fruit relatively short （the fruit is small）, weight of fruit just as big as 1.25-1.49 kg only, while weight of inorganic melon fruit can reach 2-3 kg. The research was conducted by experiment method with the aim to enhance quality of the organic melon fruit. Experiment I is： N, P and K fertilizer solution concentration as main plot （0, 20, 30, and 40 g L^-1） and dose of cow manure fertilizer as sub plot （0, 10, 15, and 20 ton hal） （there are 16 treatment combinations）. Experiment II is kinds of dung as main plot （chicken, cow, and goat） and dose of fertilizer as sub plot （20, 25, and 30 ton hat） （there are 9 treatment combinations）. Experiment III is dose of cow manure fertilizer as main plot （15, 20, 25, and 30 ton hal） and gibberellins concentration as sub plot （0, 30, 60, and 120 ppm） and （there are 16 treatment combinations）. Each of the treatment combination replicated 3 times. The result showed that chicken, cow, and goats manure can be used in organic cultivation of melons, and cow manure has the highest potential. The role of the dose is relatively low in plant growth, but to improve the quality of fruit need dose of 10-15 tons hat. The addition of inorganic NPK fertilizer solution or use of gibberellins can increase growth and fruit quality of melon （the used of gibberellins are recommended）.展开更多
Three patterns of potash application were used in the corn-wheat and rice-wheat rotation experiments,which were conducted in the upland and wetland of Siyang County, northern Jiangsu Province, and the wetland of Liyan...Three patterns of potash application were used in the corn-wheat and rice-wheat rotation experiments,which were conducted in the upland and wetland of Siyang County, northern Jiangsu Province, and the wetland of Liyang City, southern Jiangsu Province. The results of 5 cropping seasons (2 seasons/year)showed that the direct response of corn to K was larger than that of wheat, but no difference was found between rice and wheat in Siyang when the total annual amount of K was applied only in one cropping season. However, the response of wheat was much greater than that of rice in Liyang. If potash was applied in the preceding season, the residual effect of K on wheat was larger than that on rice both in Siyang and Liyang, but less than that on corn. The total effect (direct and residual effects) of K applied to corn or rice was greater than that to wheat in Siyang, but that to wheat was greater in Liyang. The direct and total effects of K application in the upland were larger than those in the wetland of Siyang; but for the wetland,the effects were larger in Liyang than in Siyang, especially in the wheat season. The results demonstrated that the most profitable practice to be recommended to the local farmers was to apply a limited amount of potash to only rice or corn but not to wheat. Equally applying half of the total annual amount of K to each of the crops may be advisable in order to lessen possible fertilization risks.展开更多
The studies for raising potash feldspar utilization ratio by physical, biological and chemical methods are carried out in laboratory and the results are presented. It is shown that calcinatory and biological methods h...The studies for raising potash feldspar utilization ratio by physical, biological and chemical methods are carried out in laboratory and the results are presented. It is shown that calcinatory and biological methods have positive effects on conversion of K in potash feldspar into water-soluble form, but the conversion is low; chemical method can change most of insoluble potassium into available form, and might be significant in industry to some extent.展开更多
文摘Generally, the diameter of organic melon fruit relatively short （the fruit is small）, weight of fruit just as big as 1.25-1.49 kg only, while weight of inorganic melon fruit can reach 2-3 kg. The research was conducted by experiment method with the aim to enhance quality of the organic melon fruit. Experiment I is： N, P and K fertilizer solution concentration as main plot （0, 20, 30, and 40 g L^-1） and dose of cow manure fertilizer as sub plot （0, 10, 15, and 20 ton hal） （there are 16 treatment combinations）. Experiment II is kinds of dung as main plot （chicken, cow, and goat） and dose of fertilizer as sub plot （20, 25, and 30 ton hat） （there are 9 treatment combinations）. Experiment III is dose of cow manure fertilizer as main plot （15, 20, 25, and 30 ton hal） and gibberellins concentration as sub plot （0, 30, 60, and 120 ppm） and （there are 16 treatment combinations）. Each of the treatment combination replicated 3 times. The result showed that chicken, cow, and goats manure can be used in organic cultivation of melons, and cow manure has the highest potential. The role of the dose is relatively low in plant growth, but to improve the quality of fruit need dose of 10-15 tons hat. The addition of inorganic NPK fertilizer solution or use of gibberellins can increase growth and fruit quality of melon （the used of gibberellins are recommended）.
文摘Three patterns of potash application were used in the corn-wheat and rice-wheat rotation experiments,which were conducted in the upland and wetland of Siyang County, northern Jiangsu Province, and the wetland of Liyang City, southern Jiangsu Province. The results of 5 cropping seasons (2 seasons/year)showed that the direct response of corn to K was larger than that of wheat, but no difference was found between rice and wheat in Siyang when the total annual amount of K was applied only in one cropping season. However, the response of wheat was much greater than that of rice in Liyang. If potash was applied in the preceding season, the residual effect of K on wheat was larger than that on rice both in Siyang and Liyang, but less than that on corn. The total effect (direct and residual effects) of K applied to corn or rice was greater than that to wheat in Siyang, but that to wheat was greater in Liyang. The direct and total effects of K application in the upland were larger than those in the wetland of Siyang; but for the wetland,the effects were larger in Liyang than in Siyang, especially in the wheat season. The results demonstrated that the most profitable practice to be recommended to the local farmers was to apply a limited amount of potash to only rice or corn but not to wheat. Equally applying half of the total annual amount of K to each of the crops may be advisable in order to lessen possible fertilization risks.
文摘The studies for raising potash feldspar utilization ratio by physical, biological and chemical methods are carried out in laboratory and the results are presented. It is shown that calcinatory and biological methods have positive effects on conversion of K in potash feldspar into water-soluble form, but the conversion is low; chemical method can change most of insoluble potassium into available form, and might be significant in industry to some extent.
