Status of Dhaincha Incorporated Soil After Rice Harvest in (Boro) Rice–Dhaincha–Rice (T. Aman) Cropping Pattern

Abstract

AbstractAn experiment was conducted at Field Laboratory of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh, to find out the effect ofdhainchaincorporation on subsequent rice crop yield and postharvest soil nutrient status. The experiment was laid out in a randomized complete block design having three replications. Ninedhainchaaccessions were used as experimental materials along with a control (withoutdhainchaplant). Seeds ofdhainchaaccessions were sown in experimental plot @ 60 kg ha−1. Sixty days olddhainchaplants were mixed up with soil. Soil samples were collected twice, before sowing ofdhainchaseeds and after rice crop harvest. Forty five days old healthy rice seedlings were transplanted in the well prepareddhainchaincorporated plots at the spacing of 15 cm x 25 cm (plant-plant x row-row). The pH and nutrient status were improved indhainchaincorporated soil over the control. The highest grain yield (5.81 t ha−1) was obtained fromdhainchaAcc. 33 incorporated plot followed by Acc. 25 (5.73 t ha−1) and the lowest in control (4.35 t ha−1). Due to the incorporation ofdhainchabiomass in soil, the rice grain yield increased 7.82% to 33.56% over the control. Among thedhainchaaccessions, number 33 showed the best performance in terms of influencing grain yield. A precise conclusion to be built up through collection of large number of germplasms from Bangladesh is needed.