酸化土壤施钙对不同花生品种（系）钙吸收、利用及产量的影响

为明确不同花生品种（系）对钙肥响应的差异及机制,在酸化土壤上,以不施钙为对照,研究钙肥（CaO 450kg/hm²）对6个花生品种（系）钙素积累、分配、利用及产量的影响。结果表明,施钙肥可促进花生针壳和籽仁对钙素的吸收,籽仁尤为明显,而对营养器官（根、茎和叶）的影响较小。山花8号对钙肥较敏感,各器官钙含量及积累量较对照均显著增加,而花育32各器官增幅较小或没有增加,对钙肥反应较为迟钝;钙肥可促进籽仁发育,6个品种（系）籽仁干重平均值显著高于对照,但对营养器官和针壳干重影响较小,因此提高了收获指数。施钙可提高荚果产量,其中山花8号荚果产量增幅最大,为49.09%,花育32增幅最小,仅为4.11%;荚果产量与针壳和籽仁钙积累量呈极显著正相关,与营养器官钙含量呈显著负相关。综上,不同花生品种（系）对钙肥的响应差异较大,生产上应根据不同花生品种（系）对钙肥的敏感程度适量施用钙肥。

Effects of Calcium (Ca) Application in Acidified Soil on Ca Absorption,Utilization and Yield of Different Peanut Varieties (Lines)

To investigate the difference and mechanism of responses of different peanut varieties (lines) to Ca fertilizer, the effects of Ca fertilizer (CaO 450kg/ha) on Ca accumulation, distribution, utilization and yield of six peanut varieties (lines) were studied in acidified soil with no Ca fertilizer as control (CK). The results showed that Ca fertilizer could promote the absorption of Ca in peanut peg, shell and seed, especially the seed, but had little effect on vegetative organs. Shanhua 8 was more sensitive to Ca fertilizer, and the content and accumulation of Ca in all organs were significantly increased compared with CK, while Huayu 32 had little or no increase, and its response to Ca fertilizer was insensitive. Ca fertilizer promoted the development of seed, and the average dry weight of seed of six varieties (lines) were significantly higher than those of CK, but had little effect on dry weights of vegetative organs, peg and shell, so the harvest indexes of all varieties (lines) were also improved by Ca fertilizer. Ca fertilizer could increase the pod yield. Among the six varieties (lines), Shanhua 8 had the largest increase range in pod yield of 49.09%, and Huayu 32 was the lowest, which was only 4.11%. In addition, there was a very significant positive correlations between pod yield and Ca accumulation in peg, shell, and seed, and a significant negative correlations between pod yield and Ca contents of vegetative organs. In conclusion, peanut varieties (lines) had great differences in response to Ca fertilizer, and Ca fertilizer should be applied appropriately according to the sensitivity of different peanut varieties (lines) to Ca fertilizer in production.