Green manuring effects on crop morpho-physiological characters, rice yield and soil properties

Abstract

A field experiment was carried out to evaluate the effect of green manure and nitrogen fertilizer on morpho-physiological traits, yield and post-harvest nutrient status of the soil during kharif season of 2017. The experiment was laid out with a randomized complete block design with twelve treatments, and was replicated thrice. The treatments were T1 [Control (no green manure ? no fertilizer)], T2 (Sesbania aculeata ? N0), T3 (Sesbania aculeata ? N15), T4 (Sesbania aculeata ? N30), T5 (Sesbania aculeata ? N45), T6 (Sesbania aculeata ? N60), T7 (Crotalaria juncea ? N0), T8 (Crotalaria juncea ? N15), T9 (Crotalaria juncea ? N30), T10 (Crotalaria juncea ? N45), T11 (Crotalaria juncea ? N60), and T12 (N60). Incorporation of green manure with nitrogen fertilizer generated consistently positive responses in important morpho-physiological traits such as chlorophyll content (SPAD value), leaf area index (LAI), light interception percent (%LI), and net assimilation rate (NAR), which may result in higher grain yield compared to control, and N60 due to greater contribution of yield determining traits. Treatment comprising green manure with N60 produced significantly the higher grain yield even over the N60. The results of this research indicated that balanced nutrients supply increased leaf chlorophyll content, LAI, %LI, NAR, and finally led to higher dry matter production and yield of rice. Incorporation of green manure also had significantly increased the macro-and micronutrient content of post-harvest soil. These results suggest that continuous use of fertilizer might lead to a yield loses of rice, and that situation could be escaped by a combined application of green manure and judicial nitrogen fertilizer management.

Conservation Agriculture Practices on Physiological Indices of Rice in Rice Based Cropping System

“…The photosynthetic ability of plant is indicated by net assimilation rate .At 0-30DAS the highest net assimilation rate of 11.32 g/m 2 /day was recorded at direct seeding rice in raised bed + brown manuring (T3) and showed significant difference over other treatments and it was at par with direct seeding rice in raised bed + green manuring (T4) (11.01 g/m 2 /day) and direct seeding rice in flat bed+ green manuring (T2) (10.83 g/m 2 /day) (Table 5. ).This result was similar with the findings of Islam et al, [2] that the rate of net assimilation was significantly affected by insitu green manuring. The lowest net assimilation rate was registered in direct seeding rice in flat bed (T5) (9.77 g/m 2 /day).…”

Predictive physico-chemical model for soil quality index in a long-term green manure farming system at tropical conditions, North-eastern Brazil

“…For shoot dry biomass, we found signi cative correlation with bulk density, Olsen's P, and soil pH. These results may be related with the high both plant residue deposition and incorporation which may change the soil bulk density and lead to improve the soil aeration capacity, soil structure, and soil nutrient contents (Adekiya et al 2019;Islam et al 2019;Zhang et al 2019).…”

Effects of Soil Tillage, Management Practices, and Mulching Film Application on Soil Health and Peanut Yield in a Continuous Cropping System

“…In addition, GM application improved chlorophyll content in tobacco leaves ( Bilalis et al, 2009 ). Islam et al (2018) also reported that GM application increased rice leaf area index and net assimilation rate. Furthermore, MF treatment increased the P N of functional wheat leaves at the filling stage ( Yang et al, 2018 ).…”