Growth and physiological responses to water and nutrient stress in oil palm

Abstract

The research was conducted to detect changes in growth, physiology and nutrient concentration in response to two watering regimes (well-watered and water-stress conditions) and to two nutrient regimes (with or without fertilization) of oil palm. Under stress conditions, changes in plant growth, dry matter allocation, relative water content, leaf relative conductivity, leaf N, P and K concentration are usually observed. These characteristics and related parameters were determined and the experiment results are listed as follows: (1) fertilization promoted the growth of oil palm under well-watered conditions, while under water stress conditions its effects on growth was negative. The ratio of root/shoot was increased under water stress condition; (2) relative water content and chlorophyll a/b content were gradually decreased while leaf relative conductivity was increased quickly under water and nutrient stress conditions during the experiment. It is obvious that water stress had a greater influence than nutrient stress on these parameters; (3) water and nutrient stress decreased leaf nitrogen and phosphorus concentration but increased potassium concentration; the combination of water and nutrient stress made significant effects on nitrogen and phosphorus concentration, but no significant effects on potassium concentration. Moreover, deficiency of both water and nutrients in combination had the greatest impact on changes in these traits of oil palm.

Impact of antioxidants supplementation on growth, yield and quality traits of canola (Brassica napus L.) under irrigation intervals in north nile delta of Egypt

“…According to Reddy et al (2004) water stress negatively influenced various physiological processes of plant which caused considerable reductions in final productivity. It was observed that, leaf chlorophyll content was reduced under water stress condition of plants (Sun et al, 2011).This reduction in chlorophyll contents under water deficit conditions is mainly due to the production of ROS that deteriorate the chloroplasts (Gill & Tuteja, 2010).…”

Modeling of Monthly Oil Palm Yield Pattern Based on Depth of Rainfall and Rainy Days

“…Efek dari rendahnya curah hujan terhadap produktivitas terlihat dalam kurun waktu 2-24 bulan kemudian. Hal tersebut terjadi karena tanaman mengalami kondisi cekaman kekeringan yang mempengaruhi kondisi fisiologis dan produktivitasnya (Henson, 2007;Zhang et al, 2007;Gardner et al, 2008;Palupi dan Dedywiyanto, 2008;Sun et al, 2011;Lakitan, 2012;Bakoume et al, 2013;dan Cha-um et al, 2013;Syarovy et al, 2015). Disisi lain, curah hujan yang sangat tinggi juga dapat menyebabkan penurunan rendemen minyak pada bulan yang sama akibat kelembaban yang berlebihan.…”

Root Distribution of Oil Palm and Soil Physical Properties in Different Planting Hole and Empty Fruit Bunches Application

“…Pemadatan tanah menyebabkan kerusakan sifat fisik tanah secara bertahap yang menganggu pertumbuhan dan fungsi akar (Yahya et al, 2010). Pertumbuhan dan fungsi akar yang terganggu menyebabkan gangguan dalam penyerapan hara dan air (Yahya et al, 2010;Sun et al, 2011;Jourdan et al,. 2000).…”