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文中把兼备CO_2浓度大于0.5%,磷肥占周围干土1%的区域称为近草把近磷肥区。试验证实:在鲁北,进入五月后,穴中CO_2浓度骤增。模拟试验证明:在穴中近草把近磷肥区里CO_2浓度与pH间,pH与[Ca~(2+)]间呈极显著直线负相关。CO_2浓度与[Ca~(2+)]呈极显著正相关。CO_2浓度与[Mg~(2+)]间以及CO_2浓度、pH与Zn、B、Mn、Fe、Cu等微量元素浓度间关系不明显。在实验条件下代入[石灰位]=K-0.51gPco_2公式作近似计算得K=5.05,与文献值相符。实脸证明:CO_2浓度提高,能改变镁钙比,其直线反比关系极显著,从而可以保证苹果质量良好。同时证明:因CO_2释放使土壤释放Ca~(2+),与文献所述苹果吸钙高峰同步相吻。讨论了穴中近草把近磷肥区中钙-氮、钙-磷、钙-钾、钙-镁关系。
In this paper, the area with CO 2 concentration greater than 0.5% and phosphate fertilizer accounting for 1% of the dry soil around is called the near-phosphate zone near grass. Test confirmed: in Lubei, into the May, the hole surge in CO 2 concentration. The results of simulation test showed that there was a significant linear negative correlation between CO 2 concentration and pH, pH and [Ca 2+] in near-phosphate zone. CO 2 concentration and [Ca 2+] showed a very significant positive correlation. The relationship between CO_2 concentration and [Mg 2+], CO 2 concentration, pH, Zn, B, Mn, Fe, Cu and other trace element concentrations was not obvious. Under the experimental conditions into the [lime bit] = K-0.51gPco_2 formula for approximate calculation K = 5.05, consistent with the literature value. Solid face proved: CO 2 concentration, can change the ratio of magnesium and calcium, the linear relationship between the very significant, so as to ensure good quality apple. Simultaneously, it was proved that Ca 2+ release from soil due to the release of CO 2 was consistent with the peak of calcium absorption in the literature. The relationship between Ca - N, Ca - P, Ca - K and Ca - Mg in Near Phosphate Fertilization Area was discussed.