首页> 外文期刊>Indian Journal of Horticulture >Diagnosis of nutrient imbalance in bunch stem necrosis affected Thompson Seedless grapevines grown on Dog Ridge rootstock using DRIS
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Diagnosis of nutrient imbalance in bunch stem necrosis affected Thompson Seedless grapevines grown on Dog Ridge rootstock using DRIS

机译:使用DRIS诊断在狗脊根茎上生长的汤普森无核葡萄藤造成的茎干坏死影响养分失衡

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摘要

A data bank of nutrient concentration vs incidence of late bunch stem necrosis (BSN) was established from survey of 73 commercial vineyards of Sangli district in Maharashtra. The diagnosis and recommendation integrated system (DRIS) was used for interpretation of results and diagnoses of nutrient imbalance in necrosis affected vineyards. The nutrient concentration in petiole, collected from the vineyards free of bunch stem necrosis, was made use for norm deriving exercise, while the indices were developed for vineyards having high incidence of necrosis for diagnosis of nutrient imbalance. The concentration of Mg, Na, Cu and Cl were significantly higher in healthy vineyards compared to unhealthy ones. Magnesium accounted for nearly 59% of the variation in the incidence of BSN. Among 44 necrosis affected vineyards, Mg was the most commonly deficient nutrient. Mn was found in excess with the highest positive indices in eight necrosis-affected vineyards, while K, Fe and Cl were high in five necrosis-affected vineyards. No major nutrient was found solely responsible for inducing BSN in grape. The DRIS indices for Ca showed a positive correlation (0.595**) with percentage bunch stem necrosis incidence while indices for Mg showed negative correlation (-0.380**) indicating that the relative balance of Ca and Mg rather than their absolute concentration governs the incidence of BSN. The overall imbalance of nutrients as reflected by sum of DRIS indices irrespective of sign showed a weak correlation with the incidence of BSN.
机译:通过对马哈拉施特拉邦桑格利地区的73个商业葡萄园进行调查,建立了营养物浓度与后期束茎坏死(BSN)发生率的数据库。诊断和建议综合系统(DRIS)用于解释坏死影响葡萄园的结果并诊断营养失衡。从没有束茎坏死的葡萄园中收集的叶柄中的养分浓度用于规范推导运动,同时为坏死率高的葡萄园开发了用于诊断养分失衡的指标。与不健康的葡萄园相比,健康的葡萄园中镁,钠,铜和氯的含量显着更高。镁占BSN发病率变化的近59%。在44个受到坏死影响的葡萄园中,镁是最普遍缺乏的营养素。在八个受到坏死影响的葡萄园中,发现锰的含量最高,而阳性指数最高,而在五个受到坏死影响的葡萄园中,钾,铁和氯的含量较高。没有发现主要的养分单独导致葡萄中的BSN。 Ca的DRIS指数与束茎坏死发生率呈正相关(0.595 **),而Mg的指数呈负相关(-0.380 **),表明Ca和Mg的相对平衡而非绝对浓度决定着发病率BSN。由DRIS指数的总和反映的营养素总体失衡,与体征无关,与BSN的发生率相关性较弱。

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