Effect of soil amendments on summer growth and survival of Azolla pinnata [India]
1986
Nandabalan, K. | Kannaiyan, S. (Tamil Nadu Agricultural Univ., Coimbatore 641003, Tamil Nadu (India). Agricultural Microbiology Dept.)
The experiment was in a randomized block design with 4 replications in 1-m2 plots. The following amendments were added to the plots and mixed thoroughly: 50 kg P/ha, 50 kg K, 500 kg neem cake, 50 kg diammonium phosphate, 10 t rice husk, 5 t fresh cow dung, 10 t rice husk, 10 t rice chaff, 5 t farmyard manure, and 10 t sawdust. Biomass increased over the control in all treatments except that of K and sawdust. The most fronds survived on rice chaff, which gave the highest single frond weight, followed by cow dung and diammonium phosphate. Rice husk gave the longest root length. Results showed that soil amendments influence azolla growth and survival in summer. Rice chaff increases moisture holding capacity. Allowing azolla to root may enhance survival over maintaining the fronds in floodwater
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