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科学实验证明,稻田种植多熟作物所吸取养分的总量中,土壤提供了相当的比例。这说明地力贡献在多熟制生产中占有重要地位。本文就浙江省滨海、河网、河谷平原及丘陵区8个点的稻田土壤中长期进行的(1979～1984)多熟制定位试验,从无肥区多熟作物产量的差别来探讨和评价地力贡献对多熟作物产量的反应,多熟制连种过程中地力贡献的持续演变,地力贡献与多熟作物高产的关系以及不同类型稻田土壤中地力贡献的变异等问题,以上论述的结果将有助于制订多熟制生产体系中合理施肥管理技术措施而作为参考和依据。
Scientific experiments show that paddy fields planted more crops to absorb the total amount of nutrients, the soil provides a considerable proportion. This shows that the contribution of fertility plays an important role in the production of multi-cooked foods. In this paper, the long-term (1979-1984) multi-ripe locating experiment was conducted in paddy soils of 8 sites in coastal areas, river networks, valley plains and hilly areas in Zhejiang Province to explore and evaluate the soil fertility based on the differences in the yields of multi-crop plants in the area without fertilization Contribution to the yield of multi-cropping crops, the continuous evolution of contribution of fertility in multi-cropping and continuous cropping, the relationship between contribution of soil fertility and high yield of multi-cropping and variation of contribution of soil fertility in different types of paddy soils, the above results will have To help formulate a multi-cooked production system rational fertilization management techniques as a reference and basis.