TY - JOUR
T1 - Mix-cropping of rice and water mimosa (Neptunia oleracea Lour.) increases rice photosynthetic efficiency, yield, grain quality and soil available nutrients
AU - Hei, Zewen
AU - Xiang, Huimin
AU - Zhang, Jiaen
AU - Liang, Kaiming
AU - Zhong, Jiawen
AU - Li, Meijuan
AU - Ren, Xiaoqiao
PY - 2022/8/15
Y1 - 2022/8/15
N2 - BACKGROUND: Cereal cultivation with legumes plays an important role in improving biodiversity and productivity. However, there are limited references concerning rice/legume mix-cropping in paddy fields. An aquatic leguminous plant, water mimosa (Neptunia oleracea Lour.), was introduced and a related field experiment of two seasons (early and late seasons in 2019) was carried out to explore the effects of rice/water mimosa mix-cropping on rice growth, yield, grain quality and soil nutrients in the present study. Three treatments – rice monocropping, rice/water mimosa intercropping and mix-cropping – were employed in this study. RESULTS: Results showed that rice grew better with greater height, tiller number, chlorophyll content, actual photosynthetic efficiency [Y(II)], maximum photochemical efficiency (Fv/Fm) and photochemical quenching coefficient (qP) in the intercropping and mix-cropping treatments. In addition, the intercropping and mix-cropping treatments increased nutrient uptake of nitrogen (N) by11.89–24.42%, phosphorous (P) by 17.75–36.61% and potassium (K) by 19.22–47.44%, and rice yield by 19.9% and 21.8%. Conversely, the non-photochemical quenching coefficient (NPQ), chalkiness degree and chalky rate of rice were lower in the intercropping and mix-cropping treatments relative to those in the monocropping treatments. Notably, soil alkali-hydrolysable N (AN), available P (AP) and K (AK) contents were the highest in the mix-cropping treatments among the three cropping systems. CONCLUSION: We suggest that rice/water mimosa mix-cropping is an environmentally friendly agroecological system with a higher output and can be extended for green rice production and largely applied in the paddy field.
AB - BACKGROUND: Cereal cultivation with legumes plays an important role in improving biodiversity and productivity. However, there are limited references concerning rice/legume mix-cropping in paddy fields. An aquatic leguminous plant, water mimosa (Neptunia oleracea Lour.), was introduced and a related field experiment of two seasons (early and late seasons in 2019) was carried out to explore the effects of rice/water mimosa mix-cropping on rice growth, yield, grain quality and soil nutrients in the present study. Three treatments – rice monocropping, rice/water mimosa intercropping and mix-cropping – were employed in this study. RESULTS: Results showed that rice grew better with greater height, tiller number, chlorophyll content, actual photosynthetic efficiency [Y(II)], maximum photochemical efficiency (Fv/Fm) and photochemical quenching coefficient (qP) in the intercropping and mix-cropping treatments. In addition, the intercropping and mix-cropping treatments increased nutrient uptake of nitrogen (N) by11.89–24.42%, phosphorous (P) by 17.75–36.61% and potassium (K) by 19.22–47.44%, and rice yield by 19.9% and 21.8%. Conversely, the non-photochemical quenching coefficient (NPQ), chalkiness degree and chalky rate of rice were lower in the intercropping and mix-cropping treatments relative to those in the monocropping treatments. Notably, soil alkali-hydrolysable N (AN), available P (AP) and K (AK) contents were the highest in the mix-cropping treatments among the three cropping systems. CONCLUSION: We suggest that rice/water mimosa mix-cropping is an environmentally friendly agroecological system with a higher output and can be extended for green rice production and largely applied in the paddy field.
KW - intercropping
KW - mix-cropping
KW - rice
KW - soil nutrients
KW - yield
U2 - 10.1002/jsfa.11744
DO - 10.1002/jsfa.11744
M3 - Article
C2 - 34952981
AN - SCOPUS:85122750586
SN - 0022-5142
VL - 102
SP - 3972
EP - 3982
JO - Journal of the Science of Food and Agriculture
JF - Journal of the Science of Food and Agriculture
IS - 10
ER -