สืบค้นงานวิจัย
Macro and Micronutrient Status of the Traditional Rubber Growing Regions of South India
A. Ulaganathan - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Macro and Micronutrient Status of the Traditional Rubber Growing Regions of South India
ผู้แต่ง / หัวหน้าโครงการ (EN): A. Ulaganathan
บทคัดย่อ (EN): Large scale rubber cultivation commenced in India about a century ago and currently most of the plantations are in second and largely in third cycles. Assessment of secondary and micronutrient status of replanting fields of large rubber estates of Kerala and Tamil Nadu, traditional rubber growing regions was carried out during 2011. The soil samples (0-30 cm) were collected from 98 replanting fields of 19 estates in different regions viz., north, north central, central and south region. The soil samples were analyzed for Ph, organic carbon, available P, K, Ca, Mg, S, Fe, Cu, Mn, Zn and B. Results showed that 84 per cent of the replanting fields were low in available ca, 95 percent in available mg and 63 per cent in available s status compared with the general critical limit (300 ppm, 120 ppm and 5 ppm for Ca, Mg and S respectively). In the case of available Mg, when compared with the critical level followed for rubber (10- 25 ppm) 21 per cent of the fields were with low status. Among the micronutrients, Fe, Cu and Mn were above the critical level in all the fields, while 68 per cent of the fields were low in Zn and b status. 58 per cent of the fields were extremely acidic (ph<4.5). Regional differences in secondary and micronutrient status was also observed. The current fertilizer management practice for rubber focus on major nutrients, N, P and K and mg is recommended in selected regions during the initial years only. Among the micronutrients, Zn is recommended in immature field for first two years. The low status of secondary and micronutrients observed in this study indicate the need for generating base line data on these nutrients through more detailed field survey and careful monitoring to evolve appropriate management strategies.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เผยแพร่โดย (EN): การยางแห่งประเทศไทย
คำสำคัญ (EN): fertilizer
เจ้าของลิขสิทธิ์ (EN): การยางแห่งประเทศไทย
หากไม่พบเอกสารฉบับเต็ม (Full Text) โปรดติดต่อหน่วยงานเจ้าของข้อมูล

การอ้างอิง

A. Ulaganathan. "Macro and Micronutrient Status of the Traditional Rubber Growing Regions of South India". ไม่ระบุหน่วยงาน. ม.ป.ป.

A. Ulaganathan. "Macro and Micronutrient Status of the Traditional Rubber Growing Regions of South India". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



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Macro and Micronutrient Status of the Traditional Rubber Growing Regions of South India
A. Ulaganathan
การยางแห่งประเทศไทย
ไม่ระบุวันที่เผยแพร่
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