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อายุและตำแหน่งใบที่มีผลต่อความเข้มข้นของธาตุอาหารในทุเรียน.
วริษาฐา จันทร์ชูวงศ์. - สถาบันเทคโนโลยีพระจอมเกล้าเจ้าคุณทหารลาดกระบัง
ชื่อเรื่อง: อายุและตำแหน่งใบที่มีผลต่อความเข้มข้นของธาตุอาหารในทุเรียน.
ชื่อเรื่อง (EN): Leaf age and position on nutrient concentration in durian.
ผู้แต่ง / หัวหน้าโครงการ: วริษาฐา จันทร์ชูวงศ์.
บทคัดย่อ: The objective of this experiment was to obtain a standardized sampling technique for leaf diagnosis as an aid of fertilization in "Mon Thong" durian. Leaf sampling was carried out in 2 orchards at Thungnonsee and Santhung districts, Ampher Kaosaming, Trad province. The experiment consisted of 4 leaf positions on twig (position 1, 2, 3 and 4) from growing tip, 4 directions (east, west, north and south), 2 branch positions on the tree canopy, namely lower (1-2 m height) and middle (3-4 m height) branches and 2 leaf flushes (1st and 2nd flush). Leaves from 5 durian trees were sampled once a month from June 1998 to March 1999. The results indicated that concentrations of N, P, K, Ca, Mg, Fe, Mn, Cu and Zn in the leaves sampled from 4 directions were not significantly different (Pฃ0.05). concentrations of K, Ca, Fe, Mn, Cu and Zn from the middle branch trend to be higher than lower branch but were not significantly different (Pฃ0.05). Concentrations of P, K, Fe and Cu in 4 leaf positions were not significantly different whereas N, Ca, Mg, Mn, and Zn in 4 leaf positions were significantly different. Ca and Mg were highest in leaf position 4 while N, Mn and Zn were lowest in leaf position 1. The significance of nutrient concentrations found in each leaf position was rather small compared to tree by tree variation within the same orchard. Differences were also found for all nutrients among 5 durian trees within the same orchard. Fe concentration increased and variation were observed with leaf age while Mn and Cu were fluctuated during the growing season. Greater variation were observed for ca, Mg and Zn which may due to lime, fertilizer applications and pesticide spray applied to foliage. In general, micronutrients variation were higher than macronutrients. The concentrations of N, P, K and Mg decreased while Ca, Fe and Cu increased with increasing leaf age but Mn and Zn were rather constant throughout the growing season. Leaf K concentration at site 2 was lower than site 1 due antagonistic effects between K and Mg. Concentration of N was lower in 2nd leaf flush compared to 1st leaf flush. In contrast, P concentration was higher in 2nd flush leaves. Concentration of Zn in 1st and 2nd flushes were low due to low soil Zn concentr5ation. Although some nutrient concentrations were differnet between 1st and 2nd flushes, they were not significantly different. At the same leaf age, concentrations of N, P, K, Ca and Mg were similar between 1st and 2nd flushes. The results suggested that durian leaves should be sampled from the leaf position 2 or 3 from growing tip of the 1st flush since some durian trees do not have 2nd flush. Leaf position 4 are sometimes not available for sample and leaf position 1 usually smaller than other position. The optimum time for leaf sampling should be the period where leaf nutrient concentrations were most stable. For durian that period occurred when leaves were about 5-7 months old which normally happened during October to December. Leaves should be sampling from all 4 directions from lower branch (1-2 m height) position on the tree canopy.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): th
เอกสารแนบ: http://www.lib.kmitl.ac.th
เผยแพร่โดย: สถาบันเทคโนโลยีพระจอมเกล้าเจ้าคุณทหารลาดกระบัง
คำสำคัญ: วิทยานิพนธ์
เจ้าของลิขสิทธิ์: สถาบันเทคโนโลยีพระจอมเกล้าเจ้าคุณทหารลาดกระบัง
รายละเอียด: The objective of this experiment was to obtain a standardized sampling technique for leaf diagnosis as an aid of fertilization in "Mon Thong" durian. Leaf sampling was carried out in 2 orchards at Thungnonsee and Santhung districts, Ampher Kaosaming, Trad province. The experiment consisted of 4 leaf positions on twig (position 1, 2, 3 and 4) from growing tip, 4 directions (east, west, north and south), 2 branch positions on the tree canopy, namely lower (1-2 m height) and middle (3-4 m height) branches and 2 leaf flushes (1st and 2nd flush). Leaves from 5 durian trees were sampled once a month from June 1998 to March 1999. The results indicated that concentrations of N, P, K, Ca, Mg, Fe, Mn, Cu and Zn in the leaves sampled from 4 directions were not significantly different (Pฃ0.05). concentrations of K, Ca, Fe, Mn, Cu and Zn from the middle branch trend to be higher than lower branch but were not significantly different (Pฃ0.05). Concentrations of P, K, Fe and Cu in 4 leaf positions were not significantly different whereas N, Ca, Mg, Mn, and Zn in 4 leaf positions were significantly different. Ca and Mg were highest in leaf position 4 while N, Mn and Zn were lowest in leaf position 1. The significance of nutrient concentrations found in each leaf position was rather small compared to tree by tree variation within the same orchard. Differences were also found for all nutrients among 5 durian trees within the same orchard. Fe concentration increased and variation were observed with leaf age while Mn and Cu were fluctuated during the growing season. Greater variation were observed for ca, Mg and Zn which may due to lime, fertilizer applications and pesticide spray applied to foliage. In general, micronutrients variation were higher than macronutrients. The concentrations of N, P, K and Mg decreased while Ca, Fe and Cu increased with increasing leaf age but Mn and Zn were rather constant throughout the growing season. Leaf K concentration at site 2 was lower than site 1 due antagonistic effects between K and Mg. Concentration of N was lower in 2nd leaf flush compared to 1st leaf flush. In contrast, P concentration was higher in 2nd flush leaves. Concentration of Zn in 1st and 2nd flushes were low due to low soil Zn concentr5ation. Although some nutrient concentrations were differnet between 1st and 2nd flushes, they were not significantly different. At the same leaf age, concentrations of N, P, K, Ca and Mg were similar between 1st and 2nd flushes. The results suggested that durian leaves should be sampled from the leaf position 2 or 3 from growing tip of the 1st flush since some durian trees do not have 2nd flush. Leaf position 4 are sometimes not available for sample and leaf position 1 usually smaller than other position. The optimum time for leaf sampling should be the period where leaf nutrient concentrations were most stable. For durian that period occurred when leaves were about 5-7 months old which normally happened during October to December. Leaves should be sampling from all 4 directions from lower branch (1-2 m height) position on the tree canopy.
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อายุและตำแหน่งใบที่มีผลต่อความเข้มข้นของธาตุอาหารในทุเรียน.
สถาบันเทคโนโลยีพระจอมเกล้าเจ้าคุณทหารลาดกระบัง
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ความปลอดภัยทางด้านจุลชีววิทยาของอาหารในโรงเรียนแห่งหนึ่งในจังหวัดเชียงใหม่ ผลของการใส่ปุ๋ยเคมีต่อความเข้มข้นของธาตุอาหารในใบลิ้นจี่ การยืดอายุการเก็บรักษาทุเรียนกวน การเพาะเลี้ยงสาหร่ายสไปรูลินา (Spirulina platensis) ในน้ำเสียฟาร์มโคนมเพื่อใช้เป็นอาหารโคนม การจัดโครงการเกษตรเพื่ออาหารกลางวันในโรงเรียนประถมศึกษาจังหวัดนครนายกตามพระราชดำริ สมเด็จพระเทพรัตนราชสุดาฯ สยามบรมราชกุมารี ผลของธาตุอาหารพืชต่อการเจริญเติบโตของกล้วยไม้ซิมบิเดียมซูเปอร์ฟรีค การพัฒนาชุดฝึกอบรมการผลิตอาหารไร้สารพิษสำหรับเกษตรกร การจัดการเกี่ยวกับทุเรียนในจังหวัดจันทบุรี การวิเคราะห์ใบเพื่อประเมินความต้องการธาตุอาหารของพริกหวานที่ปลูกแบบไม่ใช้ดิน การจัดการการผลิตทุเรียนของเกษตรกรในจังหวัดจันทบุรี
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