红壤稻田养地体系的研究Ⅰ．有机、无机肥结合对红壤稻田生产效率的影响及其养地效果

多点定位田间试验表明．在福建中低产红壤稻田中混合施用有机和无机肥料，可使水稻生产效率在短期内得到稳定增长（３０％－９２％）．经统计分析比较，水稻生产效率与有机无机总养分（或总氮）投入量呈极显著相关；有机无机肥结合的优点主要表现在土壤生产力的稳定积累和元素生产效率的提高．参试的４大有机给源配合半量化肥的作用近于等效，但在试验期限内（１－３ａ），稻谷产量无额外的互作效应，而绿肥鲜体在增产养地配合效应上具有明显的优势．

Studies on the Productivity Improving System for Paddy Soils Derived From Red EarthⅠ.The Influence of Simultaneous Application of Organic Manures and Inorganic Fertilizers on the Productivity of Paddy Soils Derived from Red Earth and Its Improvement

The results of long term field experiments showed that the rice prodpetivity of middle and low productive paddy soils derived from red darth in Fujian Province was steadily increased by the simultaneous application of organic manures and inorganic fertilizers in a short-time. The ratio of the increase of the productivity was significantly corrdlated with the total rate of organic and inorganic nutrients (or total rate of nitrogen).The main advantages of the simultaneous application of the organic manures and the inorganic fertiliaers were the steady accumulation of the production potential of the soil and the increase of the productive efficiency of the elements. The effects of rour organic manures with half-amount fertilizer were similar. No synergic effect on the rice yield was found for the simultaneous application of the organic manures and the inorganic fertilizers euring the experimental perild (1-3years). The fresh green manure had obvious effect on the increase of the yield and the improvement of soil productivity.